object is kept at a distance of 20 CM in front of a plane soon after the object move back by 5 centimetre what is the initial distance between the image and the final distance between the image and the mirror

Dear student, since initially the object was placed at 20 cm in frobt of plane mirror, then image will also be formed at the same distance only that is 20 cm from the plane mirror. So the initial distance between the image and the mirror is 20 cm. Now since the object move back by 5 cm, so the new distance of object will be 25 cm and hence the final distance of image from the plane mirror will be 25 cm. Thanks and regards