19 inches = 1.58333333 feet
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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.
No. A diameter is a length, which may be measured in feet. Square feet are used to measure areas. You cannot convert directly from linear measures to square measures.
Use the formula for a cylinder to calculate the volume. This volume will be in cubic feet; you can then convert that to gallons.
Convert everything to feet, or to inches, then multiply by pi, approximately equal to 3.1416.Convert everything to feet, or to inches, then multiply by pi, approximately equal to 3.1416.Convert everything to feet, or to inches, then multiply by pi, approximately equal to 3.1416.Convert everything to feet, or to inches, then multiply by pi, approximately equal to 3.1416.
If the radius is 8 feet then the diameter will be 16 feet.