Answer :

The object distance is equal to image distance in a plane mirror.

For the distance of man from his image to be 5m-


The distance of man from mirror+ distance of image from the mirror= 5m


Since object distance= image distance


Therefore, 2*distance of man from the mirror= 5m


Distance of man from the mirror= 5/2 = 2.5m


The man is 10m from the mirror at the starting, so he will have to walk 10 – 2.5 =7.5m towards the mirror for being 5m away from his image.


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