Question

If the radius of a hemisphere is 3r find its curved surface area

Answer 1

Hey mate...here is ur ans...☺☺

Radius = 3r

Curved surface area =

$2\pi \: r {}^{2} \\ \\ 2 \times \frac{22}{7} \times {3r}^{2} \\ \\ = > \frac{132 {r}^{2} }{7}$

Hope it helps u....thanks...☺☺