Question

The radius of sphere is 2r ,then its volume is?

Answer 1

$volume \: of \: sphere = \frac{4}{3} \times \pi \times {r}^{3}$
so
4/3 × 22/7 × (2r)^2

= 4/3 × 22/7 × 8r^2

= 33.52 r^3

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Answer 2

volume of sphere is
4/3Πr³
= 4/3*(22/7)*(2r)³
=(704/21)*r³