50/3 cubic yds of concrete
39.1116 cubic yards
About 24 cubic yards of cement is required for a slab that size.
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
90
9.3 cubic yards of cement is required for this slab.
30' x 20' (600 square feet) = 66.6 square yards.
8.25 cubic yards of concrete
39.1116 cubic yards
how may yards of concrete are needed for a floor 24 x 25 feet?
About 24 cubic yards of cement is required for a slab that size.
One square yard is nine square feet, so 27 square feet is equivalent to 3 square yards. So 3 yards of concrete will cover 27 square feet.
90
55.56 cubic yards.
For a 4-inch thick slab, you will need at least 9.48 Cubic Yards.
9.3 cubic yards of cement is required for this slab.
20 feet x 20 ft x .3333 ft = 133.33 cubic feet / 27 cubic feet per yard = 4.94 cubic yards
The term "yards" of concrete means cubic yards.