Question

Find the surface area of a sphere of radius 4.2 cm. (π = `22/7`)

Answer 1

Radius (r) of a sphere = 4.2 cm
Surface area of a sphere = 4πr²

`=4xx22/7xx(4.2)^2`

`=221.76cm^2`

Thus, the surface area of sphere is 221.76 cm²