A hollow sphere has an outer radius of 4 cm and inner radius of 1 cm. What is the volume of this hollow sphere?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 84p cm3
Formula used:
Volume of sphere with inner and outer radius = (4/3)π(R3 - r3) ---- (1)
Where R = outer radius and r = inner radius
Calculations:
Using equation (1), we get
Volume of sphere = 4/3 × p × (43 - 13)
⇒ 4/3 × p × (64 - 1)
⇒ 84p cm3