2560 sq feet 2 inches thick
1 cubic yard equals 27 cubic feet. At a six inch depth 1 cubic foot will cover 2 square feet, so 27 cubic feet will cover 54 square feet.
200 cubic feet or 7.4 cubic yards
28 cubic feet (1.037 cubic yard, rounded)
47.7 cubic feet
There are twenty-seven cubic feet in a cubic yard. So, you'd have 27,000 cubic feet in 1000 cubic yards. Assuming you leave each cubic foot intact and since there are 43,560 square feet in an acre then you'd be able to cover over half an acre. At only 6" deep you'd cover over an acre.
The answer depends on the depth to which the area is covered.
Ten cubic feet will do the job!
24 cubic feet.
A 1 cubic foot bag will cover 12 square feet at a depth of 1" A 1.5 cubic foot bag will cover 18 square feet at a depth of 1"
3 inches = .25 feet400 square feet X .25 feet = 100 cubic feet100 cubic feet / 27 cubic feet per cubic yard = 3.7 yards
240 x 3 /12 Cubic feet = 60 cubic feet
Volume = (base area) x (height) = 300 cubic feet = 111/9 cubic yard.