A plano-convex lens having radius of curvature of first surface \( 2 \, \text{cm} \) exhibits focal length of \( f_{1} \) in air. Another plano-convex lens with first surface radius of curvature \( 3 \, \text{cm} \) 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:
