Question

Volume of two spheres are in the ratio 27:64 .Find ratio of their total surface areas

Answer 1

VOL. OF SPHERE = 4/3πr³

ratio = 4/3πR³/4/3πr³ = 27/64

         R³/r³ = 27/64

R/r = 3/4

TSA = 4πR²

RATIO = 4πR²/4πr²

R²/r² = 9/16