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A man can row at 5 km/hr in still water ...

A man can row at 5 km/hr in still water . If the river is running at 1km/hr it takes him 75 minutes to row to a place and back How far is the place ?

A

2.5 km

B

3 km

C

4 km

D

5 km

Text Solution

Verified by Experts

The correct Answer is:
B
Speed of boat in still water = 5 kmph
Speed of stream = 1 kmph
Let distance is x km
`(x)/(5 + 1) + (x)/(5-1) = (75)/(60)`
`implies (5x)/(12) = (5)/(4)`
`implies x = 3` km
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