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A body is pushed up on a rough inclined ...

A body is pushed up on a rough inclined plane making an angle `30^@` to the horizontal. If its time of ascent on the plane is half the time of its descent, find coefficient of friction between the body and the inclined plane.

A

`(sqrt3)/(5)`

B

`sqrt(3//5)`

C

`(3)/(sqrt5)`

D

`3//5`

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The correct Answer is:
A
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