Chapter 8 - Rotational Motion and Equilibrium - Learning Path Questions and Exercises - Conceptual Questions - Page 302: 12

$a).$ Cylinder with greater radius, $b).$ Cylinder with greater length.

a). The moment of inertia is $\frac{1}{2}mr^{2}$. Since mass is same for both, moment of inertia depends on the radius. b). The moment of inertia is $\frac{1}{3}ml^{2}$. Since mass is same for both, moment of inertia depends on length.