Question

A rectangular room is 15 feet long and 10 feet wide. A scale drawing of the room has a width of 5 inches. What is the length of the room in the drawing??
A. 10.0 inches
B. 5 inches
C. 7.5 inches
D. 30.5 inches ​

Answer 1

C. 7.5 inches

You can write the dimensions of the room as 10:15
and the dimensions of the drawing as
5: (unknown).

Divide the original dimensions by 2 to get the unknown value.

10: 15 ÷ 2 = 5: 7.5
So, when the width is 5in, the length is 7.5in.