A hollow sphere has an outer radius of 4 cm and inner radius of 1 cm. What is the volume of this hollow sphere?

84p cm3 68p cm3 48p cm3 92p cm3

84p cm3

We know that, Volume of hollow sphere = \(\frac{4}{3}\) π(R3 - r3) We have, Outer radius (R) = 4 cm. Inner radius (r) = 1 cm. Volume of hollow sphere = \(\frac{4}{3}\) p × (43 - 13) = \(\frac{4}{3}\) p × (64 - 1) = \(\frac{4}{3}\) p × 63 = 84p