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A smooth inclined plane of length L ahvi...

A smooth inclined plane of length L ahving inclination `theta` with the horizontal is inside a lift, which is moving down with a retardation `a`. The time taken by a body to slide down the inclined plane from rest will be :

A

`sqrt((2L)/((g+a)sin theta))`

B

`sqrt((2L)/((g-a)sin theta))`

C

`sqrt((2L)/(a sin theta))`

D

`sqrt((2L)/(g sin theta))`

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