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A ball is dropped from the top of a towe...

A ball is dropped from the top of a tower of height h. It covers a distance of h/2 in the last second of its motion. How long does the ball remain in air ?
(Take `g = 10 m/s^2`)

A

`sqrt2 sec`

B

`(2+sqrt2)sec`

C

2 sec

D

None of these

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The correct Answer is:
B
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