A sphere is a regular three-dimensional object in which every cross-section is a circle.

Volume is the amount of space an object occupies and is measured in cubic units.

**Formula to calculate volume of a sphere.**

‘r’ is the radius of the sphere

π is a constant estimated to be 3.142 or

**Example:**

Calculate the volume of a sphere whose radius is 3.5 cm.

Hence, the volume of the sphere is 179.67 cm³