The radius of curvature of the convex surface of a plano convex lens is 10 cm.What is the focal length of the plano convex lens?

the radius of curvature of the plano surface is infinity.....hence use the lens makers formula and put the values of radius of convex surface as 10 and plane as infinity and calculate ….....i cant calculate because you have not given the refractive index of material of the glasss.....