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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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