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

Radius of sphere r = 7 cm
Therefore, volume of sphere = 4/3πr³
= 4/3 × 22/7 × 7 × 7 × 7 = 4/3 × 22 × 7 × 7 = 1437(1/3) cm³
Hence, the volume of sphere = 4/3πr³
= 4/3 × 22/7 × 0.63 × 0.63 × 0.63 = 4 × 22 × 0.03 × 0.63 × 0.63 = 1.05 m³(approx.)
Hence, the volume of sphere is 1.05 m³.