The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of same radius about a tangential axis in the plane of the ring is

Q: The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of same radius about a tangential axis in the plane of the ring is

(a) 2 : 3

(b) 2 : 1

(c) √5 : √6

(d) 1 : √2

Ans: (c)