A person suffering from myopia is holding a mirror at 100 cm from his face. But he cannot look at it’s image. So he moves the mirror towards him by 40 cm. Find the distance by which his image moves?
A person is standing in front of a plane mirror at 60 cm from it. Suddenly the mirror moves by some distance towards him. It was found that the final image also moves by 40 cm from the initial position towards the mirror. Find the distance moved by a mirror?