A man is standing in aroom of length 20m and height 3m at a distance 5m from one wall.
Channel: Doubtnut
Date: 2020-08-30

A man is standing in aroom of length 20m and height 3m at a distance 5m from one wall. On the facing wall a mirror is hanging. Find the minimum size of mirror required in which man will be able to see complete height of wall behind him..