1 yard of mulch at 12 inches deep would cover 25 sq. ft., so for 400 square feet you would need 16 yards. 12 inches is the depth you need to start with because the mulch will settle.
To determine how many bags of mulch you need for a 16 square foot area, you first need to decide on the desired depth of the mulch. For example, if you want a 2-inch depth, you'll need about 2 cubic feet of mulch per square foot (since there are 12 inches in a foot, 2 inches is 1/6 of a foot). For a 16 square foot area at 2 inches deep, you would need approximately 32 cubic feet of mulch. Since each bag is 0.8 cubic feet, you would need 32 / 0.8 = 40 bags of mulch.
It depends on how thick you want to apply it.
About a 1,944 square foot area at 2" depth of mulch. Roughly equivalent to 12 parking spaces.
To calculate the amount of mulch needed, first convert the dimensions to cubic feet. A 10-foot by 10-foot area is 100 square feet. For a depth of 2 inches, convert inches to feet (2 inches = 1/6 feet). Multiply the area by the depth: 100 square feet × 1/6 feet = approximately 16.67 cubic feet of mulch needed.
To determine if mulch that costs a set amount to cover a square foot is proportional, you need to consider the relationship between the cost and the area covered. If the cost remains constant regardless of the area covered, then it is proportional. For example, if $1 covers 1 square foot, $2 covers 2 square feet, and so on, then it is proportional. However, if the cost changes based on the area covered, then it is not proportional.
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.
Half a cubic foot.
Mulch is often sold by weight in bags, but a volume is assigned to the material in bags, too. We'll treat this as a volume problem as we have an area to cover (880 square feet), and a depth of coverage assigned (2 inches). We have to find the volume of that 880 square feet by 2 inch volume. First, we need to convert either the area in square feet to square inches, or the depth in inches to feet. The latter makes more sense (and it's easier), so let's do that.The 2 inches is 2/12ths of a foot, or 1/6th of a foot. We'll go with that. If we have 880 square feet by 1/6th of a foot in depth, we have 880 square feet times 1/6 feet, which is 146 2/3rds cubic feet of mulch, the required amount of mulch to cover the given area to the desired depth.
The area of a 5.9-foot square is: 34.81 square feet.
A square foot is a measure of area.
The square foot area of a 41-foot diameter circle is: 1,320 square feet.
The area of a square one foot on a side is 1 square foot