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A person can row 712 km an hour in still water and he finds that it takes him twice as long to row up as to row down the river. The speed of the stream is: -

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Question

A person can row `7 1/2` km an hour in still water and he finds that it takes him twice as long to row up as to row down the river. The speed of the stream is:

Options

  • 2 km/hr

  • 3 km/hr

  • `2 1/2` km/hr

  • `3 1/2` km/hr

MCQ

Solution

`2 1/2` km/hr

Explanation:

x : y

36 : 5

(36 – 5) t = (36 + 5) × 310 m

t = 410 m = 6 h 50 m

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Boats and Streams (Entrance Exam)
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