Multiple choice

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

  1. 84π cm3

  2. 68 π cm3

  3. 48 π cm3

  4. 92 π cm3

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Volume of hollow sphere = (4/3)π(R³ - r³). Given R=4 cm and r=1 cm. Volume = (4/3)π(4³ - 1³) = (4/3)π(64 - 1) = (4/3)π(63) = 84π cm³. Option A is correct.