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A boat crosses a lake and returns in tim...

A boat crosses a lake and returns in time `T_0`, at a speed V. On a rough day, there is uniform current al speedy to help the onward journey and impede the return journey. If the time taken to go across and retum on the same day be T. then `T/T_0` is

A

`(1-v^2)/V^2`

B

`1/(1-(v^2/V^2))`

C

`(1+v^2)/V^2`

D

`1/(1+(v^2/V^2))`

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