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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 `lambda``=``K``x^2``//``L` where `K` is a constant and `x` is the distance from one end is
(A) `(3L)/(4)`
(B) `(L)/(8)`
(C) `(K)/(L)`
(D) `(3K)/(L)`

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