Question

Difficulty: MediumRectangular Area Applications

A facility manager is replacing the flooring in a rectangular open-plan office that measures 60 ft60\text{ ft} in length and 46 ft46\text{ ft} in width. The office contains two identical rectangular utility columns, each measuring 6 ft6\text{ ft} by 5 ft5\text{ ft}, which will not be covered with the new flooring. If the new flooring material costs $22.00\$22.00 per square yard, what is the total cost of the flooring material required for the office in dollars?

Answer: 6600 dollars

Answer

6600
The correct calculation correctly subtracts the area of the utility columns to find the net area in square feet, correctly converts this area to square yards by dividing by 9, and then multiplies by the price per square yard to find the final total cost.

Step-by-Step Solution

1
Calculate the gross area of the office.
2760 sq ft
The total rectangular area without accounting for the utility columns is 60×4660 \times 46.
2
Calculate the total area of the two utility columns.
60 sq ft
Each column is 6×5=30 sq ft6 \times 5 = 30\text{ sq ft}, and there are two of them, so 30×2=60 sq ft30 \times 2 = 60\text{ sq ft}.
3
Subtract the column area from the gross area.
2700 sq ft
This provides the net area that requires new flooring.
4
Convert the net area from square feet to square yards.
300 sq yd
The flooring cost is given per square yard, and there are 9 sq ft9\text{ sq ft} in 1 sq yd1\text{ sq yd}. Therefore, 2700÷9=3002700 \div 9 = 300.
5
Calculate the total cost of the flooring material.
6600
Multiply the area in square yards by the cost per square yard: 300×22=6600300 \times 22 = 6600.

Key Concept

Calculating subtractive rectangular area and applying square unit conversions to determine total cost.
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