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Q.

River is flowing with a  velocity V¯=4i¯ ms−1 . A boat is moving with a velocity V¯BR=(2i¯+4j¯)ms−1 relative to water.  The width of river is 100m  along y-direction.  The drift of boat is

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a

100 m

b

50 m

c

25 m

d

150 m

answer is D.

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Detailed Solution

V−BR=V−Bg−V−Rg Time of crossing =1004=25 SDrift =6×25=150m
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