Question

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

Answer 1

Given: Radius of the sphere, r = 7 cm

∴ Surface area of the sphere, S = `4pir^2`

`= 4 xx 22/7 xx (7)^2`

`= 4 xx 22/7 xx 49`

= 88 × 7

= 616 cm²

Thus, the surface area of sphere is 616 cm².