Understanding the Concept
* Plane Mirrors: Plane mirrors create virtual images that are the same size as the object and appear to be behind the mirror at the same distance as the object is in front.
* Relative Velocity: Relative velocity is the velocity of one object with respect to another.
The Solution
Since the image in a plane mirror is virtual and appears to move with the same speed as the boy, the relative velocity between the boy and his image is double the boy's speed.
Calculation
* Boy's speed: 25 cm/sec
* Relative velocity (image to boy): 2 * 25 cm/sec = 50 cm/sec
Therefore, the relative velocity of the boy's image with respect to him is 50 cm/sec.
