The area covered by one cubic yard of Mulch is dependant on the depth that the
mulch is applied. At 3" it covers 108 ft2, at one inch it covers over 300 ft2.
The 'square feet' of area that it covers is 324/(depth of the mulch, in inches)
The problem here lies with the question. Landscape mulch is not measured by the yard it is measured by cubic yard. There is nothing linear about mulch. A common standard suggests that 1 cubic yard of mulch will cover about 100 sq ft of landscape 2-4 inches thick.
It depends on how deep you want your mulch to be. I usually shoot for 3 inches, in which case 1 cubic yard will cover 108 square feet (1 yard =27 cubic feet or 27 square feet to a depth of 1 foot. Divide 12 by your desired depth in inches and multiply by 27)
15 square yards at 3 inches deep.
3
5inches
162 sq.ft.
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.
One cubic yard will cover a 324 square-foot area with one inch of mulch. However your mulch should be 2 to 3 inches thick to maintain moisture and prevent weed growth. Be careful not to go to thick or you will cause mold to form in the mulch.
226.875
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).
If the mulch is spread 4 inches thick, it will cover 81 square feet. 1 yard = 27 ft3 4 in = (1/3) ft 27 ft3 / (1/3) ft = 81 ft2
4.7
The 'square feet' of area that it covers is 1,620/(depth of the mulch, in inches)
One cubic yard of mulch will cover approximately 160 square feet at 2" deep, so you would need approximately two cubic yards of mulch to cover 271 square feet at 2" deep.
To solve this convert all measurement to a yard or square yard basis: 3 inches is 0.083333333333 yard and 1500 square feet = 1500/9 = 166.6666666666667 square yards Thus the amount of mulch you need is 166.6666666666667*0.083333333333= 13.88888888883333 cubic yards. so you need to purchase 14 cubic yards of mulch for the job.