If the ratio of volumes of two spheres is 1: 8, then the ratio of their surface areas is
Ratio of volume of spheres = (ratio of radius)3
Given, ratio of volumes of two spheres is 1: 8
⇒ (ratio of radius)3 = 1 : 8
⇒ ratio of radius = 1 : 2
Ratio of surface area = (ratio of radius)2
⇒ Ratio of surface area = 1 : 4