A river is flowing from east to west at a speed of `5m//min`. A man on south bank of river, capable of swimming `10m//min` in still water, wants to sw

Monjur Alahi

A river is flowing from east to west at a speed of `5m//min`. A man on south bank of river, capable of swimming `10m//min` in still water, wants to swim across the river in shortest time. He should swim
A. due forth
B. due noth-east
C. due north-east with double the speed of river
D. none of the above


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Salim Ahmed Kawsar

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Correct Answer - A
For shortest time he has to cross the river with swimming perpendicualr to flow i.e. due north

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