Question

Find the volume of a sphere whose radius is:
(i) 7 cm
(ii) 0.63m.

Answer 1

Formula used:

Volume of sphere = $\frac{4}{3} \pi {r}^{3} \: \: {unit}^{3}$

here r = radius.

1) r= 7 cm

Volume of sphere =
$\frac{4}{3} \times \frac{22}{7} \times ( {7)}^{3} \\ \\ = \frac{4 \times 22 \times 49}{3} \\ \\ = \frac{88 \times 49}{3} \\ \\ = 1436.8 \: {cm}^{3}$

2) r =0.63 m

Volume:

$\frac{4}{3} \times \frac{22}{7} \times 0.63 \times 0.63 \times 0.63 \\ \\ = 4 \times 22 \times 0.09 \times 0.21 \times 0.63 \\ \\ = 1.04 \: {m}^{3}$

Answer 2

Hi there !

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Radius of sphere = 7cm.

Volume of sphere = 4 / 3 π r³

$\implies{ \mathsf{ \frac{4}{3} \: \pi \: r {}^{3} }} \\ \\ \implies{ \mathsf{ \frac{4}{3} \times \frac{22}{7} \times 7 \times 7 \times 7 }} \\ \\ \implies{ \mathsf{ \frac{4312}{3} }} \\ \\ \therefore{ \mathsf{ 1437\frac{1}{3} }}$

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Thanks for the question!

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