Question

The rectangular floor of a classroom is 30 feet in length and 20 in width. A scale drawing

of the floor has a length of 15 inches. what is the area in square inches, of the floor in the scale drawing

Answer 1

Answer: 150 square inches

Explanation:

Set up the proportional ratios (convert feet to inches first):

30 ft = 360 inches (there are 12 inches in 1 foot)

20 ft = 240 inches (I'm assuming there is an error in the question and the width is 20 ft, NOT 20 inches!)

360/15 = 240/x

x is the width of the scaled down rectangle

solve for x:

360x = 3600

x = 10 in

Now calculate Area = length x width

A = 15 x 10 = 150 square inches