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Q.

A girl standing on road holds her umbrella at 45° with the vertical to keep the rain away. If she starts running without umbrella with a speed of 152kmh-1, the rain drops hit her head vertically. The speed of rain drops with respect to the moving girl is :

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a

302kmh-1

b

25kmh-1

c

30kmh-1

d

252kmh-1

answer is C.

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Detailed Solution

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Question Image


V=tanθ=VGVRG

⇒1=VGVRG⇒152=VRG

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