Question

An engineer draws a scale model of a building.

• The scale of the drawing is 1 inch = 2.5 feet.
• On the drawing, one wall is 30 inches long.

What is the length of the actual wall?

Answer 1

64.5 ft. That’s because 30 inch paper= 1 inch in real life. Multiple the 30 with the 2.5

Answer 2

75 feet

Explanation:

`(2.5ft)/(1in) = (x)/(30in) \\`

By using a proportion we can solve this problem.

By isolating x we get x = 2.5(30) so x = 75.

Thus if the wall is 30 in in the model it is 75 feet in actuality.