If the linear density (mass per unit length) of a rod of length 3m is proportional...

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If the linear density (mass per unit length) of a rod of length 3m is proportional to x, where x is the distance from one end of the rod, the distance of the centre of gravity of the rod from this end is (a) 2.5 m (c) 1.5 m (b) 1 m (d) 2 m If the linear density (mass per unit length) of a rod of length 3m is proportional to x, where x is the distance from one end of the rod, the distance of the centre of gravity of the rod from this end is (a) 2.5 m (c) 1.5 m (b) 1 m (d) 2 m