The ratio of the radii of gyration of a spherical shell and solid sphere of the same mass and radius about a tangential axis is

The ratio of the radii of gyration of a hollow sphere and a solid sphere of the same radii about a tangential axis

The moment of inertia of a spherical shell and a hemispherical shell of same mass and radius about a tangential axis, passing through P will be

The ratio of the radii of gyration of a circular disc and a circular ring of the same radii about a tangential axis perpendicular to plane of disc or ring is

The ratio of the radii of gyration of a circular disc and a circular ring of the same radii about a tangential axis perpendicular to plane of disc or ring is

Find the ratio of the radii of gyration of a circular disc and a circular ring of the same radii about a tangential axis in their planes.