A hollow sphere has an outer radius of 6 cm and inner radius of 3 cm. What is the volume of this hollow sphere?
Answer & explanation
Correct answer: option 1
We know that,
Volume of the hollow sphere = V = \(\frac{4}{3}\) × π × (R3 - r3)
We have,
Outer radius (R) = 6 cm
Inner radius (r) = 3 cm
= \(\frac{4}{3}\) × π × (63- 33)
=\(\frac{4}{3}\) × p × (216 - 27)
=\(\frac{4}{3}\) × p × (189) = 252 p cm3