Question

The radius of a hemisphere is 4 cm then curved surface area of hemisphere will be

Answer 1

$\bold{Given, radius = 4cm} \\ \\ \bold{\therefore{Curved \: Surface \: Area = 2\pi {r }^{2} }} \\ \\ \bold{= 2 \times \frac{22}{7} \times 4 \times 4} \\ \\ \bold{ = \frac{704}{7} }$
$<b>= 100.57 cm^2</b>$