Question

An object is placed 1.5 m in front of the curved surface
of a plano-covex lens whose flat surface is silvered.
A real image is formed 300 cm in front of the lens.
The focal length of the lens is
(1) 100 cm
(2) 200 cm
(3) 150 cm
(4) 300 cm​

Answer 1

Answer:

I think the answer is 100 cm