Question

A person is standing in front of a plane mirror at
a distance L from mirror and observe image of
wall of height H at a distance of 3L behind the
person then calculate minimum height of mirror
required to see full image of wall in the mirror-​

Answer 1

Answer:

6

I think as the distance in front of mirror is same as the distance of the image in mirror so the distance between the picture and image formed 2l

so 3*2=6l