Radius of curvature of first surface of double convex lens is three times that of the other. If focal length of the lens is 30cm and refractive index of the lens is 3//2. Then radius of curvature of the first surface is

Radius of curvature of first surface of double convex lens is three ti

1.	Radius of curvature of first surface of double convex lens is three times that of the other. If focal length of the lens is 30cm and refractive index of the lens is 3//2. Then radius of curvature of the first surface is
Answer» 20cm 40cm 60cm 80cm Answer :C