Final answer:
To fill a 60ft by 20ft driveway with a thickness of 6", approximately 22.2 cubic yards of concrete are needed after converting the volume from cubic feet to cubic yards.
Step-by-step explanation:
To calculate the amount of concrete needed for a driveway that is 60 feet long, 20 feet wide, and 6 inches thick, we first need to find the volume in cubic feet and then convert it to cubic yards. Since concrete is typically ordered by the cubic yard for large projects, this is a common task in construction mathematics.
First, we calculate the volume in cubic feet:
- Length = 60 feet
- Width = 20 feet
- Thickness = 6 inches = 0.5 feet (since there are 12 inches in a foot)
Volume = Length × Width × Thickness = 60 ft × 20 ft × 0.5 ft = 600 cubic feet.
Now we need to convert cubic feet to cubic yards. There are 27 cubic feet in one cubic yard:
Volume in cubic yards = Volume in cubic feet ÷ 27 = 600 cubic feet ÷ 27 = approximately 22.2 cubic yards of concrete.
Therefore, for the driveway, you would need to order approximately 22.2 cubic yards of concrete.