Question

find csa and tsa of hemisphere of radius 21cm​

Answer 1

Hey!

Answer-:

Check out the attachment

HOPE IT HELPS ✌

Answer 2

Hey mate,

$r = 21cm \\ csa = 2\pi {r}^{2} \\ \\ = 2 \times \frac{22}{7} \times 21 \times 21 \\ = 2772 {cm}^{2}$

$tsa = 3\pi {r}^{2} \\ 3 \times \frac{22}{7} \times 21 \times 21 \\ = 4156 {m}^{2}$

Hope it helps you...

# heartqueen