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Q.

A person is walking in rain feels the velocity of rain as twice to his velocity. At which angle he should hold the umbrella with vertical if he moves forward, if it is raining vertically downwards.

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a

90°

b

60°

c

30°

d

45°

answer is D.

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Detailed Solution

$V_{RM} = 2 V_{M}$

$\frac{V_{M}}{V_{RM}} = \frac{1}{2}$

But $sinθ = \frac{V_{M}}{V_{RM}} = \frac{1}{2}$

$θ = 30^{0}$ with vertical.

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