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A swimmer wishes to cross a 500 - m rive...

A swimmer wishes to cross a `500 - m` river flowing at `5 km h^-1`. His speed with respect to water is `3 km h^-1`. The shortest possible time to cross the river is.

A

`10 min`

B

`20 min`

C

`6 min`

D

`7.5 min`

Text Solution

Verified by Experts

The correct Answer is:
A
(a) Shortest time =`(d)/(v) = (1//2)/(3) = (1)/(6) h = 10 min`.
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