A Projector Lens Is Needed to Form an Image on a Screen

Multiple Choice

A projector lens is needed to form an image on a screen 20 times the size of its corresponding object.The screen is located 8.0 m from the lens.What is the required focal length of the lens?

A) 0.32 m
B) 0.38 m
C) 0.73 m
D) 1.25 m