Question

The volume of a hemisphere is $2425\frac{1}{2}{cm}^3$. Find its curved surface area. (Use $\pi =22/7$)

Answer 1

Volume of a hemisphere $=\frac{2}{3}\pi r^3=2425.5c{m}^3$

$r^3=1157.6\Rightarrow r=10.5cm$

Curved surface area of a hemisphere $=2\pi r^2=2\times \frac{22}{7}\times {10.5}^2=693c{m}^2$