CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
C.
20
5
10
2.5
Given, Rato of mass numbers , A1:A2 = 27:125 ⇒ A1A2 = 27125Radius of nucleus is, R = R0 A1/3 Therefore, R1R2 = A1A21/3 = 271251/3 = 35Thus, Ratio of radii is 3:5.