Question

Find the volume and TSA of hemisphere of radius 3.5cm

Answer 1

r
$r = 3.5 \\ so \: tsa \: wil \: be \: 2\pi \: r^{2}$

Answer 2

Hey Mate!
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Here is your answer :

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Given,

Radius of sphere = 3.5 = 7/2

$volume \: of \: sphere \: = \frac{2}{3} \pi \: {r}^{3} \\ \\ = \frac{2}{3} \times \frac{22}{7} \times \frac{7}{2} \times \frac{7}{2} \times \frac{7}{2} \\ \\ = \frac{539}{6} \\ \\ = 89.83 {cm}^{3} \\ \\ surface \: area \: = 3\pi \: {r}^{2} \\ \\ = 3 \times \frac{22}{7} \times \frac{7}{2} \times \frac{7}{2} \\ \\ = \frac{231}{2} \\ \\ = 115.5 {cm}^{2}$

HOPE THIS HELPS U...