AAI ATC Junior Executive 25 Mar 2021 Shift 2 Paper

A non-conducting sphere of radius R = 5 cm has its center at the origin O of the coordinates system as shown in the figure. It has two spherical cavities of radius r = 1 cm, whose centers are at (0, 3 cm), (0, - 3 cm), respectively, and the solid material of the sphere has a uniform positive charge density $\mathit{\rho }=\frac{1}{\mathit{\pi }}\mathit{\mu }\mathit{C}{\mathit{m}}^{-3}$.Compute electric potential at point P (4 cm, 0)