Question

The radius of a sphere is 3 cm. Its total surface area will be :
(1) `18pi cm^(2)` (ii) `36 pi cm^(2)` (iii) `72pi cm^(2)` (iv) `108 pi cm^(2)`

Answer 1

Here, radius r = 3 cm
`therefore` Surface of sphere `= 4pi r^(2)`
`= 4pi(3)^(2)`
`= 36 pi cm^(2)`