Question

A real image formed by a concave mirror is magnified three times and is formed at a distance of 16 cm
from the object. Find the distance of the object from the mirror:
198 cm
2) 16 cm
3) 4 cm
4) 32 cm​

Answer 1

Answer: (3) 4cm

Explanation:

It is given that -v/u=3------ 1    and       v=16+u----- 2

from equation 1 we get v=-3u

put this value in equation 2

We get,

-3u=16+u

-4u=16

u=-4

You can ignore the minus sign since it is only for the sake of sign convention

Therefore Answer is Option (3)

HOPE IT HELPS!!