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12 in = 1 ft

Volume = 311 sq ft × 2 in

= 311 sq ft × (2 ÷ 12) ft

= 51 5/6 cu ft (≈ 51.8 cu ft)

= 51 5/6 ÷ 0.8 cu ft/bag

= 64 19/24 bags

≈ 64.8 bags

→ you need to buy 65 bags.

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Q: How many bags of rubber mulch that covers .8 cu feet would it take to cover 311 square feet at 2 inches deep?
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