Forming images with a plane mirror.?

Question

You hold plane mirror 0.50m in front of your eyes. The mirror is 0.32cm high, and in it you see a image of a tall building behind you.

a. If the building is 95m behind you, what vertical height of the building, h can be seen in the mirror at any one time?

Answer 1

Are you sure the mirror is not 0.32 m. high? 0.32 cm. is extremely small.

If 0.32 m. is the height of the mirror, the height x of the building which can be seen satisfies:

95.5 / 0.5 = x / 0.32

x = 61.1 m.

If 0.32 cm. is correct, then the height visible is 61.1 cm.