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The centre of mass of a non uniform rod ...

The centre of mass of a non uniform rod of length L, whose mass per unit length varies as `rho=(k.x^2)/(L)` where k is a constant and x is the distance of any point from one end is (from the same end)

A

`(3L)/(4)`

B

`(L)/(8)`

C

`(K)/(L)`

D

`(3K)/(L)`

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