An object placed 2m from a plane mirror is shifted by 0.5 m away from the mirror what is the distance between the object and it's image ?

The distance between the image and the the object is 5 m because first the object was placed 2 m away from the mirror than moved 0.5m more away from it,so 2+0.5=2.5m. This distance is from mirror to the object. So according to the science, the image is formed at same distance as the object is placed from the mirror. So the distance from the the image to the to the object is 2.5+2.5=5 m.