eight cubic yards
8.25 cubic yards of concrete
For a 4-inch thick slab, you will need at least 9.48 Cubic Yards.
You need to specify the slab's width and the length as well.
A yard of concrete is 27 cubic ft. Your measurements, if in feet, represents 480 cubic ft. Dividing this by 27 results in 17.78 yards.
22.2222 cubic yards (the 2s keep on going).
You will need 17.8 cubic yards of concrete.
10.67 Cubic Yards
532.4074 yards of concrete, round up to 533 yards.
6.94 Cubic Yards
3.6 cubic yards will be enough.
10 yards
6.67 Cubic Yards
4.074 cubic yards for every foot the slab is thick.
15 cubic yards
15 cubic yards
At 4" thick you will need 1.23 cubic yards.
39.1116 cubic yards