A man travel in his yacht downstream at d knots and returns the same distance upstream at u knots. What is his average rate for the round trip if the length of stream is 1?
Correct answer D. 2du/(d+u)
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Boats and Streams MCQs
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A man can row down a 10 mile stream in 2 hours and up in 5 hours. What is the average speed in miles per hour?
Correct answer C. 2 6?7
A man rowing a boat covers an average distance of 7.5 km/hr. What is the distance covered after 40 minutes?
Correct answer A. 5
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A man rows 1 km upstream in 20 minutes and 1 km downstream in 15 minutes. What is his speed of rowing in still water?
Correct answer C. 3.5
A man can row 1 km upstream in 20 minutes and downstream in 15 minutes. What is the speed of the current?
Correct answer C. 1/2 km/h
If a man takes two hours to row 3 km upstream or 15 km downstream then the speed of current is?
Correct answer C. 3
A man can row 4.5 km an hour in still water but takes twice as long to row up a stream as down it. What is the rate of stream in km/h?
Correct answer A. 1.5
Arooj swimming speed in still water is 18 km/h and speed of water is 6 km/h. How long will it take him to go downstream 72 km?
Correct answer B. 3 hours
Amanat swimming speed in still water is 14 km/h and speed of water is 4 km/h. How long will it take him to go upstream 50 km?
Correct answer B. 5 hours
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Speed of water in certain river is 6 km/h and it takes as boat four times as long to row up as to row down the river. Find the speed of the boat in still water?
Correct answer A. 10 km/h
Sana speed of rowing in still water is 12 km/h and he finds that it takes him twice as long to row up as to row down the river. Find the speed of water in the river?
Correct answer D. 4 km/h
A slip travels at the speed of 20 km/h upstream and 24 km/h downstream. Find the speed of boat in still water?
Correct answer D. 22 km/h
A boat travels at the speed of 25 km/h upstream and 35 km/h downstream. Find the speed of water?
Correct answer D. 5 km/h
Tahir can swim at the speed of 30 km/h in still water and speed of water is 4 km/h. Find his speed of swimming against the direction of water?
Correct answer B. 26 km/h