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20' x 21' x 36" = 47 cubic yards, but

20' x 21' x 4" is only 15.67 cubic yards.

Q: How much mulch do you need for a 20 by 21 play yard 4 inches deep?

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Half a cubic foot.

about 432 cubic inches

1500 x 3 = 4500 cubed ft

You need (182/3) divided by (cubic feet of mulch in each bag) bags.

Volume = 50-ft x 5-ft x 1/4-ft = 62.5 cubic feetYou'll need(62.5)/(cubic feet of mulch in each bag) bags.

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Half a cubic foot.

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.

25 cubic feet or about 1 cubic yard.

It depends on how deep you want the bark to be, the recommended depth is 2 - 4 inches (5 - 10cm) thus at 10cm deep you'd need 201m3 to cover 2006m2

The area covered by one cubic yard of Mulch is dependant on the depth that themulch 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)

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.

how many bags of mulch will i need 2 inches thick and 30 feet of ground ?

you need 1500 mulch to buy a binpet on binweevils

about 432 cubic inches

1500 x 3 = 4500 cubed ft

You need (182/3) divided by (cubic feet of mulch in each bag) bags.

Volume = 50-ft x 5-ft x 1/4-ft = 62.5 cubic feetYou'll need(62.5)/(cubic feet of mulch in each bag) bags.