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The answer to how many yards depends upon how deep the material (ie, rock or mulch) is to be in the area. Using mulch as the material, at 2" deep, the anwer would be 4.26 yards (formula is L X W divided by 150) 640/150= 4.26 yards At 3" deep, the answer is 6.40 yards (L X W divided by 100) 640/100=6.4

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15y ago
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15y ago

Something is wrong. Yards are a measure for length or distance and square feet means an area. Apples are no Pears.

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15y ago

To convert from square feet to square yards, divide the amount by 9. Thus, 420 square feet = 420/9 = 46.67 square yards.

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Q: How many yards is 384 square feet?
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