0
Volume of a cylinder = (pi) (radius)2 (length)
Radius = 1/2 diameter = 1/2 inch
21 feet = 252 inches
Volume = (pi) (0.5)2 (252) = 197.92 cubic inches = 0.8568 gallon (rounded)
That's the volume of the pipe. We have no way of knowing how much water
may be in it. It could even be empty, full of mud, tree roots, etc.
What else can I help you with?
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