The uniform solid sphere shown in the figure has a spherical hole in it. Find the position of its centre of mass.

Answer

A, B, C

Explanation

`x_(CM)=(V_1x_1-V_2x_2)/(V_1-V_2)`
`=((4/3piR^3)(0)-((4pia^3)/(3))(b))/((4/3piR^3)-4((pia^3)/(3)))`
`=(-a^3b)/(R^3-a^3)`