Question

Pls ans to the above question

Answer 1

let radius of small sphere = r
and radius of big sphere = R

a/c to question,

volume of big sphere = 27× volume of small sphere

4/3 π R³ = 27 × 4/3 π × r³

R³ = 27r³ = (3r)³

R = 3r

R/r = 3/1
R : r = 3 :1
(2) ratio of surface area = 4πR²/4πr²
R²/r² = (3/1)² = 9/1

9 : 1