Question

Find the volume of a sphere of radius $2.1cm$ $(\text{use}\pi =\frac{22}{7})$.

Answer 1

The volume $V$ of sphere of radius $r$ is given by $V=\frac{4}{3}\pi r^3$
Here, $r=2.1cm$
$\therefore V=\frac{4}{3}\times \frac{22}{7}\times (2.1{)}^3$
$\Rightarrow V=38.808c{m}^3$