Question

The diameter of sphere is 21 cm. Then, find the volume of the sphere.
1. 3851 cm³
2. 4481 cm³
3. 4851 cm³
4. 2426 cm³

Answer 1

Correct Answer - Option 3 : 4851 cm³

Given:

The diameter of sphere is 21 cm

Formula used:

Volume of sphere = (4/3)π r3

Radius (r) = diameter/2

Calculation:

Diameter of sphere = 21 cm

Radius (r) = diameter/2

⇒ (21/2) cm

Volume of sphere = (4/3)π r³

⇒ (4/3) × (22/7) × (21/2) × (21/2) × (21/2)

⇒ 4851 cm³

∴ The volume of Sphere is 4851 cm³.