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Q.

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, he has to swim in the direction 

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a

600  with  river flow

b

300  with the river flow

c

 1350 with the river flow

d

1200  with the river flow

answer is D.

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Detailed Solution

Question Image

sinθ=VwVb=36=12
Angle with river flow θ1=θ+90=1200

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