Question

Find the volume of sphere whose radius is 0.21m​

Answer 1

• 0.21 m = 0.21 × 100 = 21 cm
• Radius of Sphere (r) = 21cm
• $\sf { \: }^{ \large volume} {sphere}^{ \: } = \frac{4}{3} \pi {r}^{3} = \frac{4}{3} \times \frac{22}{7} \times {(21)}^{3}$
• $\sf = \frac{4}{ \cancel3} \times \frac{22}{ \cancel7} \times \cancel 3 \times \cancel7 \times {(21)}^{2} = 84 \times 441 = 37044 \: {cm}^{3}$
• Volume of Sphere = 37044 cm³

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Answer 2

volume of sphere =

$\frac{4}{3} \pi \: r3$

0.21 = 0.21/2×100/100=21/200