Image Formation in Plane Mirrors

Q. A man stands 10 m in front of a large plane mirror. How far must the walk before he is 5 m away from his image?

Q. A boy is observing his image in a plane mirror. The distance between the mirror and his image is 6 m. If he moves 2 m towards the mirror, then the distance between the boy and his image will be:

1. 8 m
2. 6 m
3. 2 m
4. 4 m

Q.

An object is placed between two plane mirrors inclined at an angle of 50^o. Find the number of images formed.