Four similar point masses (each of mass m) are placed on the circumference of a disc of mass M and radius R. The M.I. of the system about the normal axis through the centre O will be:

Four similar point masses (m each) are symmetrically placed on the circumference of a disc of mass M and radius R. Moment of inertia of the system about an axis passing through centre O and perpendicular to the plane of the disc will be

A disc of radius r is removed from the centre of a disc of mass M and radius R. The M.I. About the axis through the centre and normal to the plane will be:

A disc of radius r is removed from the centre of a disc of mass M and radius R. The M.I. About the axis through the centre and normal to the plane will be:

Four particles each of mass 1 kg are at the four corners of a square of side 1m. The M.I of the system about a normal axis through centre of square is

Four particles, each of mass m, are lying symmetrically on the rim of a disc of mass M and radius R. M.I. of this system about an axis passing through one of the particles and perpendicular to plane of disc is

Four particles each of mass 1kg are at the four corners of square of side 1m . The M.I. of the system about a normal axis through centre of square is