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Rain is falling with a speed of 4nVs ina...

Rain is falling with a speed of 4nVs inadirection making an angle of `30^(@)` with vertical towards south. What should be the magnitude & direction of velocity of cyclist to hold his umbrella exactly vertical, so that rain does not wet him:

A

2 m/s towards north

B

4 m/s towards south

C

2 m/s towards south

D

4 m/s towards north

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The correct Answer is:
C
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