8.25 cubic yards of concrete
For a 4-inch thick slab, you will need at least 9.48 Cubic Yards.
Assuming you pour to a depth of 4 inches, you will need 30.86 cubic yards.
30' x 20' (600 square feet) = 66.6 square yards.
100 acres = 100*4840 = 48400 sq yards 100 acres*50 feet = 48400*50/3 cubic yards = 8,066,666.66... cu yards.
You will need 0.56 cubic yards of concrete.
40.1 cubic yards
It depends on how deep the concrete. 600 sq ft at 6 inch deep is 300 cu ft = 11.1 yards. 12 inch deep is 22,2 yards; 4 inch deep is 5.5 yards
3880 cubic yards
123.44 cubic yards
about 5 yards if your slab is 4" deep
1.19 Cubic Yards
You will need 1.36 cubic yards of cement.
2.2 Yards
If the slab is the standard 4" deep, you will need at least 8.89 cubic yards.
How deep? 1 inch will take .7 yards
You'll need 1.23 Cubic Yards.