JEE Mains 11-Apr-2023 Shift 1 Solved Paper

The radius of curvature of each surface of a convex lens having refractive index 1.8 is 20‌cm. The lens is now immersed in a liquid of refractive index 1.5. The ratio of power of lens in air to its power in the liquid will be x:1. The value of x is ________.