A boy 2 m tall stands 40 cm in front of a mirror. He sees an erect image, 1 m high. Which of the following is/are correct about the mirror :

An object 1 cm tall is placed 4 cm in front of a mirror. In order to produce an upright image of 3cm height one needs a

The image of the flame of a candle, in a concave mirror, is formed at a distance of 30 cm in front of the mirror, Height of the flame is 10 cm and its image is 5 cm high. Distance of the focus from mirror is

A boy stands straight in front of a mirror at a distance of 30 cm away from it. He sees his erect image whose height is (1/5)^(th) of his real height . The mirror he is using is

An object is placed at a distance of 40 cm in front of a convex mirror of radius of curvature 40 cm. List four characteristic of the image formed by the mirror.

A boy stands straight in front of a mirror at a distance of 30 cm from it. He sees his erect image whose height is (1)/(5) of his real height. The mirror he is using is