5.33 recurring cubic yards
How Many Cubic Yards Of Concrete In A 18'x24'x4" Slab?
Six yards of concrete
A slab that is (18/3 yd)(24/3 yd)(4/36 yd) has a volume of (6)(8)(1/9) yd^3 = 5 1/3 yd^3.
1 cu yd = 27 cu ft therefore 142.56 cu ft = 5.28cu yds