JEE Advanced 2021 Paper 1

An extended object is placed at point O,10cm in front of a convex lens L1 and a concave lens L2 is placed 10cm behind it, as shown in the figure. The radii of curvature of all the curved surfaces in both the lenses are 20cm. The refractive index of both the lenses is 1.5. The total magnification of this lens system is