Question

Find the surface area of a sphere of radius 7 cm.

Solution :

The surface area of the sphere = 4πr²

= `4 xx 22/7 xx square^2`

= `4 xx 22/7 xx square`

= `square xx 7`

∴ The surface area of the sphere = `square` sq.cm.

Answer 1

The surface area of the sphere = 4πr²

= `4 xx 22/7 xx bbunderline7^2`

= `4 xx 22/7 xx underlinebb49`

=  88 × 7

∴ The surface area of the sphere = 616 sq.cm.