Question

The surface area of a sphere is $5544c{m}^2$, find its diameter and volume.

Answer 1

The surface area of a sphere $=5544c{m}^2$

So,

$4\pi r^2=5544$

$r^2=441$

$r=21cm$

$Diameter=2\times 21=42cm$

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

Therefore,

$=\frac{4}{3}\pi (21{)}^3=\frac{4}{3}\times \frac{22}{7}\times 21\times {21}^2$

$=38808c{m}^3$

Hence, this is the answer.