A plano-convex lens having radius of curvature of first surface 2 cm exhibits focal length of \({f}_{1}\) in air. Anothe…

A plano-convex lens having radius of curvature of first surface 2 cm exhibits focal length of \({f}_{1}\) in air. Another plano-convex lens with first surface radius of curvature 3 cm has focal length of \({f}_{2}\) when it is immersed in a liquid of refractive index 1.2 . If both the lenses are made of same glass of refractive index 1.5 , the ratio of \({f}_{1}\) and \({f}_{2}\) will be