Question

Volume of a sphere is 38808 cm cube find its radius and hence its surfaces area

Answer 1

Volume of a sphere = 4/3πr³

38808 = 4/3πr³

38808 × 3/4 = πr³

29106 = πr³

π = 22/7

r³ = 29106 × 7/22

r³ = 9261

r = ∛9261

r = 21cm

Surface area of a sphere is 4πr²

4 × 22/7 × 21 × 21 = 5544cm²

Answer 2

Volume of a sphere = 4/3πr³

38808 = 4/3πr³

38808 × 3/4 = πr³

29106 = πr³

π = 22/7

r³ = 29106 × 7/22

r³ = 9261

r = ∛9261

r = 21cm

Surface area of a sphere is 4πr²

4 × 22/7 × 21 × 21 = $\bf{5544cm}$²