1 gallon = 231 cubic inches
Volume of a cylinder = (pi) R2 L = (pi) (6)2 (36) = 1296 pi = 4,071.5 cubic inches = 17.626 gallons
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The volume of a cylinder with a diameter of 30 inches and 36 inches long is 25,446.9 cubic inches.
The volume for a cylinder with a diameter of 60 inches and a length of 29 inches is: 82,000 cubic inches.
To answer this question, you can calculate the volume of the cylinder in cubic inches, then use the fact that a gallon is 231 cubic inches to convert to gallons. Cylinder volume is the cylinder base area (the circle that is 12 inches in diameter) times the height. Cylinder base area: 12 inch diameter, using pi x r2 = 3.14159 x 62 = 113 in2. Cylinder volume: 113 in2 x 10 ft x 12 in/ft = 13560 in3. Conversion to gallons: 13560 in3 (divided by) 231 in3/gallon = 58.7 gallons.
Convert everything to feet, then use the formula for the volume of a cylinder. Since the answer will be in cubic feet, you'll then have to convert it to gallons.
volume of a cylinder is h(pi)r2 or 144*24.5^2*pi or 271546 in3 or 30171 ft3 converting to Gal we get 225700 gal