Mathematics

Problem

Find the expression for the volume of material required to make a hollow spherical shell of outer radius

R

cm and inner radius

r

(R>r)

. a)

4\pi\,(R^{2}-r^{2})

\dfrac{4}{3}\pi\,(R^{3}+r^{3})

\dfrac{4}{3}\pi\,(R^{3}-r^{3})

\dfrac{4}{3}\pi\,(R-r)^{3}