How many yards of concrete would it take to cover a 20ft x 12 ft x 4 inches thick?

To calculate the volume of concrete needed, first convert the thickness from inches to feet: 4 inches is 1/3 of a foot. The volume in cubic feet is then calculated as 20 ft x 12 ft x (1/3 ft) = 80 cubic feet. Since there are 27 cubic feet in a cubic yard, divide 80 by 27 to find the volume in cubic yards: 80 / 27 ≈ 2.96 cubic yards. Therefore, approximately 3 cubic yards of concrete would be needed.