Question

Find the volume of a sphere whose radius is
(i) 7cm (ii) 0.63m

Answer 1

(i) Radius $=7cm$

Volume of sphere$=\frac{4}{3}\pi r^3$

$\begin{array}{c}=\frac{4}{3}\times \frac{22}{7}\times 7\times 7\times 7\\ =1437.33c{m}^3\end{array}$

(ii) Radius $=0.63m$

Volume of sphere $=\frac{4}{3}\pi r^3$

$\begin{array}{c}=\frac{4}{3}\times \frac{22}{7}\times \frac{063}{100}\times \frac{063}{100}\times \frac{063}{100}\\ =1.047816m^3\end{array}$