A hollow sphere has an outer radius of 4 cm and inner radius of 1 cm. What is the volume of this hollow sphere?
Answer & explanation
Correct answer: option 1
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