The radius at which the CG of mass B should be is

Question

A body of mass 10 kg with its CG 200 mm from the axis of rotation is to be completely balanced by another mass B of 5 kg placed in the same plane. The radius at which the CG of mass B should be is

         (a) 500 mm                     (b) 400 mm     

         (c) 300 mm                     (d) 200 mm