The answer to 12x12x4 is 576
To calculate the amount of concrete needed for a 12x12x4 slab, first convert the dimensions to feet: 12 feet by 12 feet by 4 inches (which is 1/3 foot). The volume in cubic feet is 12 x 12 x (1/3) = 48 cubic feet. Since concrete is typically sold by the cubic yard, divide the volume by 27 (since there are 27 cubic feet in a cubic yard): 48 ÷ 27 ≈ 1.78 cubic yards of concrete is required.
18 feet = 9 yards 12 feet = 4 yards 9 yards X 4 yards = 36 square yards A cubic yard is 36" x 36 " x 36 " 36 " / 4" = 9 (4" sections) Thus, 1 cubic yard has 9 square yard layers which are 4" thick So, 1 cubic yard will cover 9 square yards 4" thick So, 4 cubic yards will cover 36 square yards which are each 4" thick