Math CentralQuandaries & Queries


Question from Doug:

How much concrete will i need for a hole that is 20 feet deep 20 inches in diameter with a 8-inch pipe in it. I need to know how much concrete on the outside of the 8-inch pipe.


You can use our volume calculator to find the volume of a hole which is 20 feet deep and 20 inches in diameter. Then use the volume calculator again to find the volume of the 20 foot pipe. The difference is the volume of concrete you need.


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