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A swimmer can swim with 5ms^(-1) in stil...

A swimmer can swim with `5ms^(-1)` in still water. He wants to cross a river having width 200m heading perpendicular to the flow. Speed of flow is uniformly increasing from zero at side to `3ms^(-1)` at mid from both side of the river. Then the time taken by the swimmer to cross the river will be

A

40sec

B

60sec

C

80sec

D

90sec

Text Solution

Verified by Experts

`t=(s_(y))/(u^(y))=(200)/(5)=40`
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