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Q.

A river is of width 120m which flows at a speed of 8 ms−1. If a man swim with a speed of 5ms−1 at an angle of 1270  with the stream, his drift on reaching other bank is

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a

300 m

b

150 m

c

200 m

d

50 m

answer is B.

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Detailed Solution

Question Image

From figure dvbcosθ=xvw−vbsinθ
120545=x8−535⇒1204=x5
x=30×5=150m

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