Final answer:
To calculate the cubic yards of concrete, you multiply the Length, Width, and Depth (in feet) to get cubic feet and divide the resulting number by 27, which is the number of cubic feet in one cubic yard.
Step-by-step explanation:
The finish calculation for figuring the cubic yards of concrete, after you've determined the volume in cubic feet using the formula Length x Width x Depth, is to divide the total cubic feet by 27. This is because there are 27 cubic feet in one cubic yard. Hence, the correct formula to find the cubic yards of concrete would be option 1: Length x Width x Depth (in feet) divided by 27.
To apply this formula, one should first calculate the volume in cubic feet and then convert that number into cubic yards by dividing by 27. For example, if you had a length of 6 feet, a width of 4 feet, and a depth of 0.5 feet, the volume in cubic feet would be 6 x 4 x 0.5, which equals 12 cubic feet. Dividing 12 cubic feet by 27 gives you approximately 0.44 cubic yards of concrete.