Ray Optics Q2: Find Focal Length of Mirror

[sphouxay]

Homework Statement

A 2.0--cm tall object is placed in front of a mirror. A 1.0--cm tall upright image is formed behind the mirror, 165 cm from the object.

What is the focal length of the mirror?

Homework Equations

The Attempt at a Solution

I tried 37 cm, it was incorrect

 

[berkeman]

Homework Statement

A 2.0--cm tall object is placed in front of a mirror. A 1.0--cm tall upright image is formed behind the mirror, 165 cm from the object.

What is the focal length of the mirror?

Homework Equations

The Attempt at a Solution

I tried 37 cm, it was incorrect

Why did you try 37? What equations are you using?