Ascale drawing shows a room to be 3 inches by 4-1/2 inches. carpet, which is $15 per square yard, is to be installed in the room. if the scale is 1 inch to 4 feet, how much would it cost to install the carpet?

Scale = 1 inch : 4 feet


Find actual width :

Width = 3 inches
Actual Width = 3 x 4 = 12 feet


Find actual length :

Length = 4 1/2 inches 
Actual Length = 4 1/2 x 4 = 18 feet


Find Area :

Area = 12 x 18 = 216 ft²


Find Cost :

1ft² = $15
216 ft² = 15 x 216 = $3240


The carpet will cost $3240