= thevolume of a cylinder where V is Volume we are working in inches so volume is in cubic inches pi = 3.14159265 R is the radius in this case it would be 1/2" or .5" h is the height (3.14159265)(.5times.5)(12)(3.14159265)(.25)(12) 9.42477795 cubic inches 1 cubic inch equals 0.00432900302529817 us gallons so the answer is 0.040799892258313486 us gallons
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Volume of a cylinder = (area of the round end) x (length) = (pi) R2 L
R = radius = 1/2 the diameter = 0.75 inch
Length = 12 inches
Volume = (pi) (0.75)2 (12) = 21.206 cubic inches = 0.0918 gallon = 11.75 fluid ounces (rounded)
Wow, a trick question!
The correct answer is some.
If you specify a pipe size then we can do math and figure it out.
6 what? 6 inch diameter?
V = 3.14 x (6/2)2 x 12 = 113.04 cubic inches
113 / 231 = 0.498 gallon almost 1/2 gallon