A slide that is 3/8 inches by 3/4 inches is projected onto a screen that is 3 and a half feet by 7 feet, filling the screen. What will be the ratio of the area of the slide to its image on the screen?

Question

anonymous · Answer

A. 1 : 112
B. 1 : 2304
C. 2 : 4205
D. 1 : 12,544

anonymous · Answer

Area of slide: (3/8)*(3/4)=(9/32)
Area of screen in inches =42*84=3528

Ratio of slide to screen : (9/32):3528
Simplify by dividing both sides of the ratio by (9/32), and the result is:

1:12,544