Scale of 3 inches = 2 feet. If the photo is 7.5 inches long, how many feet long is the painting?

Science & Mathematics by Anonymous 2018-05-25 11:05:04

Social Science

5 answers

Anonymous

5 feet
Anonymous

Scales are ratios. 2 feet = 24 inches. 3 inches divides into 24 inches 8 times. Therefore the scale is actually 1 : 8 1 + 8 = 9 parts. photo = part = 7.5 inches painting = 8 parts = 8 x 7.5 inches = 60 inches = 5 feet.
Anonymous

ft/in 2/3 = x/7.5 2(7.5)/3 = x 5 feet
Anonymous

The easiest way to solve this problem is to use a proportion. 3 ÷ 2 = 7.5 ÷ x x = ⅔ * 7.5 = 5 feet
Anonymous

7.5 inches x 2 feet/3 inches = 5 feet