One solid sphere A and another hollow sphere B are of same mass and same outer radius. Their momentsof inertia about their diameters are respectively, IA and IB such that

Let same mass and same outer radii of solid sphere and hollow sphere be M and R, respectively. The moment of inertia of solid sphere A about its diameter,IA=25MR2                    …(i)The moment of inertia of hollow sphere (spherical shell) Babout its diameter,  IB=23MR2              …(ii)From Eqs. (i) and (ii), we getIA