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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 in the figure.

For u = 3 km/hr and v = 5 km/hr, the time taken to cross the river in minimum time will be :

A

can reach to B in 7.5 min

B

can reach to B in 6 min

C

can reach to B in less than 6 min

D

can never reach to B

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The correct Answer is:
A
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