Here is the problem which I am struggling on, please help me!
Problem: For safety reasons, you install a rear-window lens with a - 0.297 m focal length in your van. Before putting the van in reverse, you look through the lens and see the image of a person who appears to be 0.335 m tall and 0.243 m behind the van.
Part I: Determine the distance of the person behind the van?
_________ m
Part II: Determine the height of the person?
___________ m
I need tutor help to solve the above problem.