Given that radius = 3cm.
volume of sphere = 43×π×r3\frac{4}{3}\times \pi \times r^334×π×r3
= 43×π×33\frac{4}{3}\times \pi \times 3^334×π×33
= 43×π×27\frac{4}{3}\times \pi \times 2734×π×27
= 4×π×94\times \pi \times 94×π×9
= 36πcm336\pi \mathrm{cm}^336πcm3
