A 1.5 m tall man stands 2 m in front of a flat wall mirror. Please find: image distance and height of image

I have the formulas but i don't know how to solve this without the focal point or a radius...pls help!!!!!!!

1 answer

image distance 2metres behind mirror
height is 1.5metres
for plane mirror focal length is infinty
so 1/f=1/v + 1/u reduces to
v= -u
v= -(-2)=2
magnification = -v/u=1