67.
A circular disc A of radius r is made from an iron plate of thickness t and another circular disc B of radius 4r is made from an iron plate of thickness t/4. The relation between the moments of inertia IA and IB is
(a) IA >IB
(b) IA = IB
(c) IA < IB
(d) Depends on the actual values of t and r
Ans. c
(5)