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Q.

A person aiming to reach the exactly opposite point on the bank of a stream is swimming with a speed of 0.5 m/s at an angle of 1200 with the direction of flow of water. The speed of water in the stream is

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a

0.25 m/s

b

1 m/s

c

0.433 m/s

d

0.5 m/s

answer is C.

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Detailed Solution

Let v be velocity of river water. As shown in figure  sin300=v/0.5 

or    v=0.5sin300=0.5×1/2=0.25 m/s

 

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