Question

Find the volume and surface area of a sphere of radius $6.3cm$

Answer 1

Radius of sphere, $r=6.3cm$

Volume of sphere $=\frac{4}{3}\pi r^3$
$=\frac{4}{3}\pi \times (6.3{)}^3$
$=\frac{4}{3}\times \frac{22}{7}\times (6.3{)}^3$
$=1047.816c{m}^3$

Surface area of sphere $=4\pi r^2$
$=4\times \frac{22}{7}\times (6.3{)}^2=498.96c{m}^2$