Question

Find the surface area of a sphere of radius $14\mathrm{cm}$

Answer 1

Find surface area of sphere :

Given, radius of sphere, $r=14\mathrm{cm}$

Surface area ($S$) of a sphere is given as,

$S=4{\mathrm{\pi r}}^2$

Assuming $\mathrm{\pi }=\frac{22}{7}$,

Thus,

$$\begin{gathered} S=4·\frac{22}{7}·{14}^2 \\ =2464{\mathrm{cm}}^2 \end{gathered}$$

Therefore, surface area of the sphere of radius $14\mathrm{cm}$ is $2464{\mathrm{cm}}^2$