Question

CSA of hemisphere of radius 7cm

Answer 1

$csa \: of \: hemisphere \: = 2\pi {r}^{2} \\ \: \: = 2 \: \times \: 22 \div 7 \: \times 7 \times 7 \\ here \:7and7are \: canclled \\ = \: 2 \times 22 \times 7 \\ = 44 \: \times \: 7 \\ = 308 {cm}^{2}$

Hope it helps you

Answer 2

Step-by-step explanation:

CSA of hemisphere =

$2\pi \: r \}^{2} \\ 2 \times \frac{22}{7} \times 7 \\ 11$

=

csa of radius 7 cm = 11

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