# SOLUTION: If I have a hole that is 20 inches deep an 7 inches in Dia, how many bags of 40 lbs quickcrete will it take to fill 8 holes?

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 Question 356766: If I have a hole that is 20 inches deep an 7 inches in Dia, how many bags of 40 lbs quickcrete will it take to fill 8 holes?Answer by Fombitz(13828)   (Show Source): You can put this solution on YOUR website!First find the volume of each hole which can be modeled as a cylinder with a 7" diameter and 20" height. or approximately cubic inches For 8 holes, cubic inches. . . . From the Quikrete 5000 spec sheet, each 80 lb bag provides 0.60 cubic feet. Convert to cubic inches (12 inches/foot)^3. cubic inches So then, bags . . . If this is a math problem, round up to 6 bags. If this is a project, buy 10% more, get 7 bags.