A man walks in rain with a velocity of \( 5 \mathrm{kmh}^{-1} \). The rain drops strike at him a...

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A man walks in rain with a velocity of \( 5 \mathrm{kmh}^{-1} \). The rain drops strike at him at an angle of \( 45^{\circ} \) with the
\( \mathrm{P} \)
horizontal. Velocity of rain if it is falling vertically
W
downward-
(1) \( 5 \mathrm{kmh}^{-1} \)
(2) \( 4 \mathrm{kmh}^{-1} \)
(3) \( 3 \mathrm{kmh}^{-1} \)
(4) \( 1 \mathrm{kmh}^{-1} \)
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