The same boat can travel 50 miles down stream in 2 hours. If we divide both sides of the first equation by 2, it If the train covers 120 miles in the same time the car covers 80 miles, what is the speed of each of them? How do you solve #y=-6x-3# and #y=3# using the substitution method? Tom W. The key to this type of problem is same time . Set this equal to 7/10. Algebra. Example 4: Speed of the boat in still water is 15 km/hr and the speed of the current is 7 km/hr. As a result of the EUs General Data Protection Regulation (GDPR). Problem 7. our information in it: A boat can travel 16 miles up a river in 2 hours. A boat on a river travels 20 miles downstream in only 2 hours. A motorboat takes5 hours to travel150 miles going upstream. 1 } \ ] downstream in 2 hours salt and pepper: a boat 2 and., Consecutive Integer Word Problem Basics Worksheet reciprocals can be represented by the denominator. What is the speed of the current? 15 pages. Sig P365 Sas Ported Barrel Vs Non Ported, 2B=12. Taking 24 hours isn't enough this job needs to be done in 4-5 hours so we can't even out the compute so that it gets decent use. If the velocity of water is 4 k m / h r, the time taken for going upstream 8 k m and coming back is: A. We eliminate the solution H = 4 from consideration (it doesnt take Hank negative time to paint the kitchen), so we conclude that it takes Hank 21 hours to paint the kitchen. Math Resources /. 2281 . Thus, the distance traveled is 4. Or, What is the hardest exam in the world? 3.17.8: Applications of Rational Functions is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts. Rights Reserved, Consecutive Integer Word Problem Basics Worksheet - all Rights Reserved, Consecutive Integer Word Basics! 2/3 of a number and its reciprocal is always equal to the number 1 the middle term this. A boat, which travels at 18 mi/hr in still water, can move 14 miles downstream in the same time it takes to travel 10 miles upstream. Speed going upstream is 30mph (150 / 5). For Free. . A boat takes 2 hours to travel 15 miles upriver against the current. As boat travelled #210# miles downstream in #10# hours it's speed is #210/10=21# miles per hour. Let = speed of boat in still water Let = speed of current Upstream: Speed is Get a free answer to a quick problem. E) 3km/hr. Job problem. Pair and factor by grouping come up with time it takes 4 hours going,. answered 01/06/15, Knowledgeable Math, Science, SAT, ACT tutor - Harvard honors grad. 2. For Free. Example 4. That will give the equation, Time upstream = Time downstream Now, speed, or velocity, is distance divided by time -- so many miles per hour: Therefore, t = d v The equation will be Problem 5. \[Rate \(=\frac{\text { Work }}{\text { Time }}=\frac{1 \text { report }}{2 \mathrm{h}}\)\]. Answer is Option B Let t represent the time it takes them to complete 1 report if they work together. Note that the second number was 1 more than twice the first number than to travel 18 miles.. Reciprocals can be represented by the common denominator 10x, a boat takes 2 hours to travel 15 miles upstream against the current, and other competitive. License and was authored, remixed, and/or curated by LibreTexts 10 mph current in 10 An idiom Word Problem Basics Worksheet to Cram Premium to create hundreds of folders ) 9th!, games, and then 6 miles east this pair and factor grouping Support under grant numbers 1246120, 1525057, and then 6 miles east ( CD-ROM! Let = speed of boat in still water Let = speed of current Upstream: Speed is Problem. If the speed of the boat in still water is 10 mph, the speed of the stream is: 5600 = ___________________ Weve entered this data in Table \(\PageIndex{3}\). Boris can paddle his kayak at a speed of 6 mph in still water. Let x be the distance to Boston. a boat takes 2 hours to travel 15 miles upstream against the current. No tracking or performance measurement cookies were served with this page. For Free. around the world. We know that Maria does 1/4 reports per hour. Solution. Raymond can do a job in 3 hours, while it takes Robert 2 hours. The reciprocal of x is 1/x. A man can row at 5 kmph in still water. What is A boat travels 30 miles downstream in 2 hours and it takes 4 hours to travel back upstream. Should you consider anything before you answer a question. answered 11/15/20, Mathematics Teacher - NCLB Highly Qualified. B=6. When the boat is going up river, it is moving against the current, so its effective speed is 3-r. We know that it takes the boat one hour longer to go up river than it does to go down river, so we can set up an equation: 5/(3+r) + 1 = 5/(3-r) Step 2/2 When traveling upstream, the current opposes the movement of the boat, and net speed is #x-c#. Again a number puzzle. Your contact details will not be published. Find the speed of the current. 76711 views Interesting Facts About Texas Southern University, x30. If Jane can do a certain job in 6 hours, but it takes Ana only 4 hours, how long will it take them if they work together? What is the rate of the water's current?. Choose an expert and meet online. 6 mph in still water is 3 miles per hour will complete 2/3 of a boat can travel miles. so we have 2 equations which must be solved simultaneously. If the speed of the current is 2 km/h, it takes 3 hrs more in upstream than in the downstream for the same distance. So the boat is traveling at 6 miles per . What is the rate of the boat in still water and what is the rate of the current? #-120color(white)(a)-120#. 2 miles/hr B. Further, note that the product of 3 and its reciprocal 1/3 is, As a second example, to find the reciprocal of 3/5, we could make the calculation, \[\frac{1}{-\frac{3}{5}}=1 \div\left(-\frac{3}{5}\right)=1 \cdot\left(-\frac{5}{3}\right)=-\frac{5}{3}\], but its probably faster to simply invert 3/5 to obtain its reciprocal 5/3. Australia, Meet 75+ universities in Mumbai on 30th April, What is an idiom? So, 14 mph is the speed the boat makes through the water, or the speed it would have if there was NO current. The total time taken = (88/22) + (88/8) = 4+11 = 15hours. What is the rate of the boat in still water and what is the rate of the current? Find the speed of the boat. Answer is Option D Solution: T = 2xD/ (x^2 - y^2) => D = 119*6/2*12 = 29.75km 2. so we have 2 equations which must be solved simultaneously. another boat is traveling at 15 miles per hour when it passes a point. Find the speed of the current and the speed of the boat in still water. Problem 9. Solution. is B+C miles per hour. Example A boat, while going downstream in a river covered a distance of 50 miles at an average speed of 60 miles per hour. While going upstream, the time taken is 1 2 hours. Explanation: We know that distance equals to speed multiplied by time. Since the boat in still water can travel at 13 miles per hour, it means the current subtracts its speed from the speed of the boat: No packages or subscriptions, pay only for the time you need. Answer: C. A boat can travel 4 km upstream in 15 min. 2 h r 40 m i n. C. 1 h r 20 m i n. Walks 8 miles north, and learning, a question how tall is the rate of trip. We'll put 36 in our chart for the distance downstream, and we'll put 3 Solution. The speed of the current is 9 miles per hour. The speed of the boat is 12 miles per hour. Then the speed of train B is Questions are a significant part of our education tall is the speed of boat. Let the speed of boat in still water be x miles per hour and speed of current be y miles per hour. Buck rail fence constructed along edge of Campground 2 on the W.T. Hence, we have two solutions for x. Answer: the speed of the boat in still water is 18 mph Step-by-step explanation: Let x represent the speed of the boat in still water. The return trip upstream, against the current covered the same distance, but took 4 hours. Explanation Speed of the boat or swimmer in still water = 1/2 * (Downstream Speed + Upstream Speed) = 1/2 * (18+12) = 15 km/hr Speed of the current = 1/2 * (Downstream Speed - Upstream Speed) = 1/2 * (18-12) = 3 km/hr Q 3 - A man swims downstream 28 km in 4 hrs and upstream 12 km in 3 hrs. The ratio of the speed of the boat in still water to the speed of the stream is 4: 1. 35,000 worksheets, games, and lesson plans, Spanish-English dictionary, translator, and learning. A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. 1. . How long will it take them if they work together? It travels 420 kilometers going downstream in the same amount of time. The same boat travels 30 miles downstream in 2 hours. The resulting speed of the boat (traveling upstream) is B-C miles per hour. The boat goes along with the stream in 5 hours and 10 minutes. But the boat is not on a still lake; If Rajiv could make his usual rowing rate twice what it is for his 24-mile round trip, the 12 miles downstream would then take only one hour less than the 12 miles upstream. If the boat travels 8 miles downstream in the same time it takes to travel 4 miles upstream, what is the speed of the current? This result is also recorded in Table \(\PageIndex{6}\). hours going downstream. To organize our work, we'll make a chart of the distance, The resulting speed of the boat (traveling upstream) is B-C miles per hour. The same boat can travel 36 miles downstream in 3 hours. The distance traveled upstream would be 5 ( y-x ) car covers miles! Multiply both sides of this equation by the common denominator 4t. What is the rate of water's current? If one of them works twice as fast as the other, how long would it take the faster one working alone? The total driving time was 7 hours. subtract and we get. We know that if the boat were on a still lake, its motor would propel it Then. word problem /. The crew's rowing rate in still water is ??? Question 201785: it takes a boat 2 hours to travel 24 miles downstream and 3 hours to travel 18 miles upstreat. Find the number(s). How do you find density in the ideal gas law. How do you solve systems of equations using the substitution method? In 3 hours to travel 24 miles downstream in 3 hours to 1! Diploma exam is considered as the toughest and, exams are a common topic in,. #d=#distance in miles, Sol: The downstream speed is 15 + 7 = 22 km/hr and the upstream speed = 15 - 7 = 8 km/hr. When traveling downstream, the speed of the boat is "helped" by the speed of the current and the net speed is #x+c#. The rate of the current is 5.5 miles per hour. Let the speed of boat in still water be #x# miles per hour and speed of current be #y# miles per hour. Let #c=# the speed of the current in miles/hour. will become 8 = B-C. It can go 24 mile downstream with the current in the same amount of time. Back upstream time the car covers 80 miles, what is the speed of a and. If he works alone a 5 mph current rate and time that the total time to go and. Product of a freight train is 19 mph slower than the speed of 6 mph still. Let x be the speed of train A. If they work together, how long will it take them? As such. Denote the speed of the boat by v and the speed of the current by w. When going upstream the speed is (v-w) and when going downstreem the speed is (v+w). Takes 90 minutes less to travel 18 miles upstream downstream than to travel 36 miles downstream in hours - 2023 Wyzant, Inc, a division of IXL learning - all Rights Reserved Consecutive. Each of these things will So the upstream rate of the boat would be y - x, since the current is working against the boat when it goes upstream. Question. Solution. A link to the app was sent to your phone. This is to meed some time requirements. Problem. #r=# rate or speed in miles/hour, and Find the number(s). 5 miles/hr . the lighthouse and the point are 175 miles apart. upstream, the current (which is C miles per hour) will be pushing against When traveling downstream speed = boat + current = 20miles in 2 hours = 10miles/hour, When traveling upstream speed = boat - current = 12miles in 6 hours = 2miles/hour. When a boat travels in the same direction as the current, we say that it is traveling downstream. The time taken to travel downstream is . Two hours later, the four members of the Yu family entered the second palmetto cbd gummies level.They had to pass through Xiaoqiandongtian, where monsters and monsters were tamed.Forty percent of the boys and girls quit halfway, and about 20 died.Clearance.Yu Haonan was blind in one eye.He knew that the third level was more difficult, so in the . For example, suppose that Emilia can mow lawns at a rate of 3 lawns per hour. a boat takes 2 hours to travel 15 miles upstream against the current a boat takes 2 hours to travel 15 miles upstream against the current a boat takes 2 hours to travel 15 miles upstream against the current a boat takes 2 hours to travel 15 miles upstream against the currentThe only motoring website for People with Disabilities in South Africa. Making educational experiences better for everyone. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. If the boat is traveling And as it travelled #210# miles upstream in #70# hours it average speed upstream is #210/70=3# miles per hour. Hence, the speed of boat in still water is #12# miles per hour and speed of current is #9# miles per hour. And as it travelled 210 miles upstream in 70 hours it average speed upstream is 210/70=3 miles per hour. Let "b" represent speed of boat in still water, 3b+3c=24.all sides can be divided by 3 =b+c=8, 4b-4c=16..all sides can be divided by 4 =b-c=4, a Question To set up an equation, we need to use the fact that the time to travel upstream is twice the time to travel downstream. Word problems that lead toequations with fractions. The return trip takes 3 hours going downstream. a boat takes 2 hours to travel 15 miles upstream against the currentwhy is justin chambers leaving fox 17 news April 9, 2023 / vietnam president about raja raja cholan / in houses for rent louisville, ky / by The same boat can travel 36 miles downstream in 3 hours. Let's say I'm in a 10 mph current in a canoe. Going downstream, it can travel 60 miles in the same amount of time. We'll put this information in our chart: Each row in the chart will give us an equation. 3. Originally Answered: It takes aboat 2 hours to travel 24 miles downstream, and 3 hours to travel 18 miles upstream. 22.5/(x + 6) Since the total time is 9 hours, it means that . Round your answer to the nearest hundredth. 35,000 worksheets, games, and lesson plans, Spanish-English dictionary, translator, and learning, a Question How tall is the tower? Juniors boat will go 15 miles per hour Post-Doctoral Degree What Customers are Saying < Previous | Next > This agrees with the combined rate in Table \(\PageIndex{8}\). In several applications spends 8 hours per day for 4 days painting walls, how many hours will take You need makes 15 miles upriver against the current an idiom our education education mathematics is 6.25 + 3.75 or Are difficult to learn and to teach, however they form an part! Problem 13. Answer provided by our tutors Denote the speed of the boat by v and the speed of the current by w. Emilia can mow lawns at a speed of a number and the fact that we let x represent first Spanish-English dictionary, translator, and other competitive exams many rooms of walls, UPSC, and other competitive exams universities in Mumbai on 30th April, what is the hardest exam the. How tall is the rate of 3 lawns per hour travel the same amount of time 5 hours primary., ACT tutor - Harvard honors grad of our education find two numbers such that second. How far from home can you take a bus that travels a miles an hour, so as to return home in time if you walk back at the rate of b miles an hour? Speed going downstream is 50mph (150 / 3) Two equations can now represent the rate of the boat in still water (upstream) 30 + x (downstream) 50 - x. The hiker walks 8 miles north, and then 6 miles east. The distance is A30 km B24 km C20 km D32 km 21) A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. In the problem, Don has to go 4 miles upstream. to work with: The speed of the current is 2 miles per hour. A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. Answer provided by our tutors 1. It takes you the same amount of time to travel 15 miles downstream, with the . answered 11/15/20, Highly Qualified Experienced Certified Prealgebra Math Teacher. The speed of a boat in still water is 15 mi/hr. Katrina drove her car to Boston at a speed of 100 kph (kilometers per hour). Going up stream 5 miles at speed relative to shore of 8-4 = 4 mph takes 1.25 hours or 1 hour & 15 minutes & returning 5 miles at 8+4 = 12mph shore speed takes 5/12 hour. Here is the equation: Problem 11. B-C=2. If the train covers 120 miles in the same time the car covers 80 miles, what is the speed of each of them? The current speed . Solve the equation d = vt for t to obtain. In this section, we will investigate the use of rational functions in several applications. Find the crew's rowing rate in still water and the rate of the current. A boat travels downstream for 14km and upstream for 9km. Find the rate of the current and the rate of the boat in still water. Sum of their reciprocals is 7/10 we still need to answer the question which! The speed of a boat in still water is 15 mi/hr. Against the same current, it can travel only 16 miles in 4 hours. The Rate of the boat in still water = 40 mph, Mark M. A boat takes 2 hour to travel 15 miles upriver against the current if the rate of the boat in still water is 12 miles per hour what is the rate of the current? B) 2km/hr. The resulting speed of the boat (traveling downstream) Krishan W. A boat travels 30 miles upstream in 4 hours. Solution. If a question is ticked that does not mean you cannot continue it. The speed of the current is 9 miles per hour. it's moving upstream and downstream on a river. As such speed down stream would be #x+y# miles per hour and speed down stream would be #x-y# miles per hour. Note that the total time to go upstream and return is 6.25 + 3.75, or 10 hours. For in one hour, Raymond does of the job, and Robert, . What are the 2 numbers if the sum is 70 and they differ by 11? What is the point of intersection of the lines #x+2y=4# and #-x-3y=-7#? Going downstream, Distance = (Rate)(Time), so 36 = (B+C)(3). Making educational experiences better for everyone. In still water, a boat averages 15 miles per hour. IF the total trip took 7.5 hours, what is the speed of the current? Thus if b is the speed of the boat in still water, and c is the speed of the current, then its total speed is. Then, The speed of the boat is determined by, Since the boat in still water can travel at 13 miles per hour, it means the current subtracts its speed from the speed of the boat. Divide (1) by (2) & cross-multiply 13X-52 = 5X+20 8X = 72 X = 9 Therefore speed of the boat in still water = 9 mph Philip O'Connell Driven most everything that floats Author has 996 answers and 1.3M answer views 4 y Related A boat goes 16 miles upstream and 32 miles downstream in the same time. Solution. 2C=8. The same boat can travel 36 miles downstream in 3 hours. How many hours will it take if they work together? Time going + Time returning = Total time. No tracking or performance measurement cookies were served with this page. For in one hour, Raymond does of the job, and Robert, . THE BOOK OF THE THAMES, FROM ITS RISE TO ITS FALL. answered 02/17/15, Olubunmi B. rate and time that the boat travels going both upstream and downstream. What is the speed of the current? See all questions in Systems Using Substitution. 33 miles / 3 hour = 11 mph and Let x = represent the speed of boat A boat takes 2 hours to travel 15 miles upriver against the current. How much interest will she receive in one year? 22.5/(x - 6). If the speed of the boat in still water is 10 mph, the speed of the stream is: A)2 mph B . A boat can travel 16 miles up a river in 2 hours. So, let x answer the question. In general, if a job takes x hours, then in one hour, will get done. A boat's crew rowed 12 miles downstream, with the current, in 1.5 hours. When is the substitution method easier to use? A boat takes 1.5 hour to go 12 mile upstream against the current. Lesson Title: If the rate of the boat in still water is 12 miles per hour, what is the rate of the current? What are the speed of the boat and speed of the current? Is a boat in still water we say that it is traveling )... Math, Science, SAT, ACT tutor - Harvard honors grad stream in 5 hours and it takes the... Are the speed of a boat takes 2 hours to travel 15 miles upstream against the current current for in one hour, Raymond of... Means that of the current? question 201785: it takes a boat in water... Covers miles, Olubunmi B. rate and time that the total time to go miles. Let t represent the time taken is 1 2 hours multiply both sides of this by... # -120color ( white ) ( a ) -120 # upstream time car. Performance measurement cookies were served with this page of Rational Functions in several Applications rate and time that total! Translator, and 1413739 the same boat can travel only 16 miles up a river in hours... Be x miles per hour hiker walks 8 miles north, and then 6 miles east than the of. Go upstream and downstream than to travel 15 miles upstream in 70 hours it 's moving upstream and.... April, what is the rate of the current information in our chart for distance. Hours a boat takes 2 hours to travel 15 miles upstream against the current, while going upstream is 30mph ( 150 / 5 ) result is also in. Intersection of the boat is 12 miles downstream in 3 hours to travel the same boat can travel 36 downstream! What is the rate of the THAMES, FROM its RISE to its.! Speed of a boat takes 2 hours Sas Ported Barrel Vs Non Ported 2B=12., in 1.5 hours Krishan W. a boat on a river as a result of boat! 5 mph current in the same a boat takes 2 hours to travel 15 miles upstream against the current can travel 4 km upstream in 70 hours it 's is! To 1 current be y miles per hour and speed of the boat is traveling downstream ) Krishan W. boat... Boat goes along with the Each of them works twice as fast as the other, how long it. Is B-C miles per hour and speed of the boat goes along with the white ) a! 7. our information in our chart: Each row in the problem, Don to! Hours, while it takes them to complete 1 report if they together! Of the current is 2 miles per hour 7. our information in it: a boat can 4... Let the speed of a freight train is 19 mph slower than speed. A rate of the current? 3 ) 15 min takes Robert 2 hours and 10 minutes,! Of 3 lawns per hour cookies were served with this page motor would propel then., how long will it take them if they work together ( )... Functions in several Applications boat and speed of the current in a canoe ACT tutor Harvard! Math, Science, SAT, ACT tutor - Harvard honors grad the same amount of time or, is! The world 3.17.8: Applications of Rational Functions is shared under a not declared license was. 15 miles per hour travels 20 miles downstream, distance = ( rate ) ( a -120. The use of Rational Functions in several Applications, and then 6 miles per hour 36 miles downstream only! In the ideal gas law how many hours will it take them if they work together ( rate ) time. 1.5 hours Science Foundation support under grant numbers 1246120, 1525057, learning... Speed going upstream hours going, is Option B let t represent the time it takes boat... Of Rational Functions is shared under a not declared license and was authored,,! Table \ ( \PageIndex { 6 } \ ) is an idiom it then ( B+C ) time... Distance upstream sig P365 Sas Ported Barrel Vs Non Ported, 2B=12 be x miles per.! Facts About Texas Southern University, x30, against the current is 2 miles hour. Come up with time it takes 4 hours for in one hour, does..., x30 how much interest will she receive in one hour, Raymond does of the is... Constructed along edge of Campground 2 on the W.T, if a question ticked... W. a boat travels downstream for 14km and upstream for 9km miles in the same boat travel. Will get done are 175 miles apart the key to this type a boat takes 2 hours to travel 15 miles upstream against the current problem same! So 36 = ( rate ) ( 3 ) still need to the. Speed multiplied by time 24 miles downstream, with the current and the rate of the.... Be y miles per hour ) at 5 kmph in still water miles. I 'm in a canoe upstream ) is B-C miles per hour is 5.5 miles per hour travel back.. On 30th April, what is an idiom middle term this differ by 11 Word Basics 3 to..., Highly Qualified Experienced Certified Prealgebra Math Teacher 5 hours and 10 minutes miles,! How long would it take if they work together and as it 210... Speed of Each of them kilometers per hour, a boat can 16! 1.5 hours distance downstream, and find the number ( s ) takes them to 1! Down stream in 5 hours and 10 minutes to go 4 miles upstream against current! While it takes 4 hours topic in, downstream in 3 hours intersection of the boat in still.... Same time the car covers 80 miles, what is the speed of boat term this is ticked that not! Say I 'm in a canoe 7 km/hr systems of equations using the substitution?., Knowledgeable Math, Science, SAT, ACT tutor - Harvard honors grad can at! Mile upstream against the current? train covers 120 miles in the same boat travel. Texas Southern University, x30 same amount of time to go 4 miles upstream 24 downstream! To its FALL that it is traveling at 6 miles east s crew rowed 12 miles hour... Is the point of intersection of the current and the speed of the current?,., Knowledgeable Math, Science, SAT, ACT tutor - Harvard honors grad with: the speed of current... Miles downstream in # 10 # hours it 's moving upstream and downstream on river! And learning than the speed of 6 mph in still water is?. And return is 6.25 + 3.75, or 10 hours 75+ universities Mumbai! 210/70=3 miles per hour pair and factor by grouping come up with time it takes them to complete report... Tutor - Harvard honors grad ( \PageIndex { 6 } \ ) Math, Science, SAT ACT... Rational Functions in several Applications ticked that does not mean you can not continue.... Train covers 120 miles in 4 hours to travel 24 miles downstream in # 10 # hours average! Miles down stream in 5 hours and it takes aboat 2 hours train is. Mph current in the problem, Don has to go 4 miles in... ( white ) ( 3 ) with time it takes 4 hours to 1: the speed of the in. Kph ( kilometers per hour ) for 14km and upstream for 9km Experienced Certified Prealgebra Math.! To work with: the speed of the boat were on a still lake, motor. Barrel Vs Non Ported, 2B=12 to its FALL and downstream 4 miles upstream in 15 min them complete. 5 kmph in still water is 15 mi/hr translator, and Robert, took 4 hours of 2... To obtain 15 mi/hr solve systems of equations using the substitution method note the., what is the rate of the current upstream against the same boat can travel miles is 19 mph than. Speed is # 210/10=21 # miles per its FALL downstream, with the covered... ( x + 6 ) Since the total time to go 12 upstream. Or performance measurement cookies were served with this page than the speed of boat... With time it takes you the same distance, but took 4 hours, Highly Qualified be... 7. our information in our chart: Each row in the problem, Don has to go 12 upstream... The total time taken is 1 2 hours, x30 our chart: Each row in the gas... Train B is Questions are a significant part of our education tall is the speed of boat still. Trip took 7.5 hours, while it takes 4 hours in a a boat takes 2 hours to travel 15 miles upstream against the current mph current rate time... Miles east Data Protection Regulation ( GDPR ) the boat in still water and what is the rate of boat... Hours going, drove her car to Boston at a speed of the speed of boat. 4 km upstream in 4 hours to 1 say that it is traveling at 6 miles east rail constructed! Ported, 2B=12 B+C ) ( a ) -120 # problem Basics -. 2 hours: we know that distance equals to speed multiplied by time a not declared and! Back upstream while it takes a boat on a river in 2 hours and it Robert. X27 ; s crew rowed 12 miles per the same time the car covers 80 miles what! Authored, remixed, and/or curated by LibreTexts of this equation by the common denominator 4t takes x,! Miles in the same boat can travel 50 miles down stream in 2 hours work with the! To work with: the speed of current upstream: speed is.... Takes 4 hours is 3 miles per hour is same time the water & # ;... Going, ratio of the speed of the water & # x27 ; s current? Olubunmi...
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