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To calculate the number of 80-pound bags of ready-mix concrete needed for a 22 square foot area at 4 inches deep, first, determine the volume in cubic feet. The volume is 22 sq ft × (4/12) ft = 7.33 cubic feet. An 80-pound bag of concrete typically yields about 0.6 cubic feet. Therefore, you would need approximately 12-13 bags (7.33 / 0.6 ≈ 12.22).

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2w ago

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