Moment of inertia of a solid spherical shell of mass M of inner radius R1 and outer radius R2 is given by :
1
\( \frac{2}{5} \mathrm{M}\left(\mathrm{R}_2^2+\mathrm{R}_1^2\right)\)
2
\( \frac{2}{5} \mathrm{M}\left(\frac{\mathrm{R}_2^5-\mathrm{R}_1^5}{\mathrm{R}_2^3-\mathrm{R}_1^3}\right)\)
3
\( \frac{2}{5} \mathrm{M}\left(\mathrm{R}_2^2-\mathrm{R}_1^2\right) \)
4
None of these