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

Q: Three rings each of mass P and radius Q are arranged as shown in Fig. The moment of inertia of the arrangement about YY’ will be

Numerical

(a) $\frac{7}{2} PQ^2 $

(b) $\frac{2}{5} PQ^2 $

(c) $\frac{5}{2} PQ^2 $

(d) $\frac{2}{7} PQ^2 $

Ans: (a)