A driveway is 15 feet wide by 40 feet long with a thickness of 4 inches. If concrete costs $60 per cubic yard and labor costs $1.25 per square foot, what is the total cost?

A driveway is 15 feet wide by 40 feet long with a thickness of 4 inches. If concrete costs $60 per cubic yard and labor costs $1.25 per square foot, what is the total cost?

• A. 1,194
• B. 1,500
• C. 2,000
• D. 1,100

Answer: (A)

Determining the total cost comes from two parts: how much concrete is needed and how much labor costs for installing it. First, find the volume of concrete. The driveway is 40 ft long, 15 ft wide, and 4 inches thick. Convert the thickness to feet: 4 inches is 4/12 = 1/3 ft. So the volume in cubic feet is 40 × 15 × 1/3 = 200 ft³. Convert to cubic yards since concrete is priced by the yard: 200 ÷ 27 ≈ 7.407 yd³. At $60 per cubic yard, the concrete cost is 7.407 × $60 ≈ $444.44. Next, calculate labor. The area is 40 ft × 15 ft = 600 ft². Labor is $1.25 per square foot, so labor cost is 600 × $1.25 = $750. Add them together: $444.44 + $750 ≈ $1,194.44. This rounds to about $1,194, which matches the given total.

Determining the total cost comes from two parts: how much concrete is needed and how much labor costs for installing it.

First, find the volume of concrete. The driveway is 40 ft long, 15 ft wide, and 4 inches thick. Convert the thickness to feet: 4 inches is 4/12 = 1/3 ft. So the volume in cubic feet is 40 × 15 × 1/3 = 200 ft³. Convert to cubic yards since concrete is priced by the yard: 200 ÷ 27 ≈ 7.407 yd³. At $60 per cubic yard, the concrete cost is 7.407 × $60 ≈ $444.44.

Next, calculate labor. The area is 40 ft × 15 ft = 600 ft². Labor is $1.25 per square foot, so labor cost is 600 × $1.25 = $750.

Add them together: $444.44 + $750 ≈ $1,194.44. This rounds to about $1,194, which matches the given total.