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Old 01-16-2011, 05:44 PM   #1
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How many 80 pound bags of concrete go in to an 8 inch x 4 foot round form

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Old 01-16-2011, 08:07 PM   #2
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I suck at geometry but a little Googling leads me to this.

How to calculate a cylinder volume:
http://www.ehow.com/how_5951536_calc...-cylinder.html

1 - 80lb bag = 2/3 cubic feet

8" = .666 feet
4' = 2' feet radius

Volume = 8.4 cubic feet

13 bags



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