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A boy standing at the top of a tower of 20m of height drops a stone. Assuming `g=10ms^(-2)`, the velocity with which it hits the ground is :-

A

10.0m/s

B

20.0m/s

C

40.0m/s

D

5.0m/s

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The correct Answer is:
B
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DISHA PUBLICATION-MOTION IN A STRAIGHT LINE-Exercise-1
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