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A bullet looses ((1)/(n))^(th) of its ve...

A bullet looses `((1)/(n))^(th)` of its velocity passing through one plank.The number of such planks that are required to stop the bullet can be:

A

`n^2/(2n-1)`

B

`(2n^2)/(n-1)`

C

infinite

D

n

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