Question

A 12-toot wall measures 2.5 inches on a

scale drawing. In the drawing, a second
wall is 9 inches long. What is the actual
length of the second wall?

Answer 1

actual length of the second wall is 43.2 ft

Explanation:

Let x be the actual length of the second wall

Write measurements in ratios with feet to inches:

First wall: 12 : 2.5 = 12/2.5

Second wall: x : 9 = x/9

Equate the two fractions and solve for x:

12/2.5 = x/9

Multiply both sides by 9: 43.2 = x

Therefore, the actual length of the second wall is 43.2 ft