Convert everything to cubic feet. It should be easy then. Since one yard = 3 feet, 1 cubic yard = 27 cubic feet; also, one square foot x 1/4 foot = 1/4 cubic foot.
5inches
It depends on the thickness and the density. One ton should be about 15 cubic feet when compacted, so it would cover 30 square feet 6 inches thick or 45.
22.2222 cubic yards (the 2s keep on going).
36 tonnes
8.25 cubic yards of concrete
One "yard" of dirt (meaning one cubic yard) contains 46,656 cubic inches. Spread 8 inches thick this will cover 5832 square inches or 40.5 square feet.
A cubic yard is 46,656 cubic inches. Spread to a thicknes of 5 inches, a cubic yard of concrete covers 9332.1 square inches, which is 64.8 square feet.
5inches
1 cubic yard/(1/9 of a yard) = 9 square yards.
39.1116 cubic yards
It depends how thick the gravel is being laid - at 4 inches thick, a cubic yard will cover 81 square feet.
66 cu ft
226.875
27 square feet Answer. 15 square metres at 3 inches thick.
1 cubic yard covers 324 square feet per inch of thickness, divide 324 by thickness in inches to get coverage, i.e. 4 inches thick would cover 324/4=81 square feet, 36 inches thick would cover (you guessed it) 9 square feet.
It depends on how thick the mulch is applied. For example, if applied at an average depth of two inches, the cubic yard of mulch will cover 162 square feet. If applied at an average depth of four inches, half that area or 81 square feet, etc.
36x36x36 inches or 3x3x3 feet or 27 cubic feet. If applied a foot thick, it will cover 27 square feet; 6 inches thick = 54 square feet (e.g.: an area 9 feet by 6 feet); 3 inches thick = 81 square feet (e.g.: an area 9 feet by 9 feet).