Question

If the radius of a sphere is 12 cm, its surface area is .
(Take $\pi =3.14)$

• A. $1900c{m}^2$
• B. $2808.64c{m}^2$
• C. $1808.64c{m}^2$
• D. $1800.64c{m}^2$

Answer 1

The correct option is C $1808.64c{m}^2$

Given,
Radius of the sphere, r = 12 cm
Surface area of the sphere
$=4\pi r^2=4\pi \times {12}^2=4\pi \times 144=576\pi =1808.64{\text{cm}}^2$

$\therefore$ Surface area of the sphere is
$1808.64{\text{cm}}^2$.