Question

Find the total surface area of a hemisphere of radius $10cm$.

Answer 1

Given, radius of hemisphere $\left(r\right)$ $=10cm$
$\therefore$ total surface area $=3\pi r^2$
$=3\times \frac{22}{7}\times 10\times 10c{m}^2$
$=\frac{6600}{7}c{m}^2$
$=942.857c{m}^2$