A concentric hole of radius R/2 is cut from a thin circular plate of mass M and radius R. The moment of inertia of the remaining plate about its axis will be

A hole of radius R//2 is removed from a thin circular plate of radius R and mass M. The moment of inertia of the remaining plate about an axis through centre O and perpendicular to the plane of the plate is

A hole of radius R//2 is removed from a thin circular plate of radius R and mass M. The moment of inertia of the remaining plate about an axis through centre O and perpendicular to the plane of the plate is

Four holes of radius R are cut from a thin square plate of side 4 R and mass M . The moment of inertia of the remaining portion about z-axis is : .

Four holes of radius R are cut from a thin square plate of side 4 R and mass M . The moment of inertia of the remaining portion about z-axis is : .

A rectangular piece of dimension lxxb is cut out of central portion of a uniform circular disc of mass m and radius r. The moment of inertia of the remaining piece about an axis perpendicular to the plane of the disc and passing through its centre is :

A hole of radius R/2 is cut from a thin circular plate of raduis R as shown in the figure. If the mass of the remaining plate is M, then find moment of inertia of the plate about an axis through O perpendicular to plane