Posted by Lexi on .
In an 8 inch by 12 inch rectangular photograph, the image of a building is 5 inches high. If the photograph is magnified until its perimeter is 720 inches, what is the height, in inches, of the image of the building in the larger photograph?

math 
Henry,
P1 = 2*8 + 2*12 = 40 In.
P2 = 720 In.
h = (P2/P1)*ho = (720/40) * 5 = 90 In.