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.
A 6-inch diameter pipe that is 16 feet long has a volume of: 3.14 cubic feet
Volume is 201.06 cubic feet.
1 cubic foot = 12 x 12 x 12 = 1728 cubic inches The given cube is 40 x 48 x 52 = 99840 cubic inches = 99840/1728 = 57.777 cubic feet
An object that is 38 inches wide by 19 inches deep by 68 inches long is 38 inches x 19 inches x 68 inches = 49,096 cubic inches in volume.A cubic foot is a cube that is one foot on an edge. That's 12 inches on an edge, so the cubic foot is 12 inches x 12 inches x 12 inches = 1728 cubic inches in volume.Our 49,096 cubic inches divided by 1728 cubic inches = about 22.43 cubic feet.
The volume of a cylinder eight inches wide and five feet long is: 3,016 cubic inches or 1.745 cubic feet.
This cylinder has a volume of: about 0.7 cubic feet.
A 10-inch diameter cylinder that is 12 feet long has a volume of: 11,300 cubic inches.
A cylinder that has an 18-inch diameter and is 36 inches long has a volume of: 5.3 cubic feet.
Volume = 11,451 cubic inches or 6.26 cubic feet.
A cylinder with an 8-inch diameter and that is 10 feet long has a volume of about 3.49 cubic feet.
The volume is 0.87266 cubic feet.
The volume is 34.361 cubic feet.
This cylinder has a volume of 1,845.69 cubic feet.
15,552 cubic inches.
This cylinder's volume is 35,342.9 cubic inches.
1,845.63 cubic feet.