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A swimmer wishes to .cross a river 500 m...

A swimmer wishes to .cross a river 500 m wide flowing at a rate 'u'. His speed with respect to still water is 'v'. For this, he makes an angle` theta` with the perpendicular as shown ip. the. figure.

To cross the river in minimum time, the value of `theta` should be:

A

`0^(@)`

B

`90^(@)`

C

`30^(@)`

D

`60^(@)`

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The correct Answer is:
A
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