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A man can swim in still water at a speed...

A man can swim in still water at a speed of `6 kmph` and he has to cross the river and reach just opposite point on the other bank.If the river is flowing at a speed of `3 kmph`,and the width of the river is `2km`, the time taken to cross the river is (in hours)

A

`(2)/(27)`

B

`(2)/(sqrt(27))`

C

`(2)/(3)`

D

`(2)/(sqrt(45))`

Text Solution

Verified by Experts

The correct Answer is:
D
`V_(m) =6 kmph, V_(w) =3 kmph, t=(d)/(sqrt(v_(m)^(2)-v_(w)^(2)))`
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