Three rings each of mass m and radius r are so placed that they touch each other. The radius of gyration of the system about the axis as shown in the figure is

Three rings, each of mass m and radius r , are so placed that they touch each other. Find the moment of inertia about the axis as shown in Fig.

Three rings each of mass M and radius R are placed in contact with each other as shown . Then MI of the system about YY' axis is

Three rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY¢ will be

Two identical concentric rings each of mass m and radius R are placed perpendicularly. What is the moment of inertia of the system about the axis of one of the rings ?

Three discs each of mass M and radius R are placed in contact with each other as shown in figure here. Then the MI of the system about an axis XX' is

Four rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY' will be

Three rings each of mass M and radius R are arranged according to the figure. The moment of inertia of this system about an axis XX' on its plane would be

Three rings, each of mass P and radius Q are arranged as shown in the figure. The moment of inertia of the arrangement about YY' axis will be

Four particles each of mass m are placed at the corners of a square of side length l . The radius of gyration of the system about an axis perpendicular to the plane of square and passing through its centre is