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Consider the volume of the pipe as the difference in the volume of two cylinders, one containing the whole pipe and the other the empty space inside. Use the formula for the volume of a cylinder : Pi*r*r*h. Find the volume of the first cylinder with the larger radius and subtract from it that of the cylinder with the smaller radius. The height (or length) is the same for both volume calculations. The result of subtracting these is the volume occupied by the pipe.
How about this plan: We'll explain how to solve the problem,and then you go ahead and get the answer on your own.The pipe is a cylinder.The volume of the cylinder is: (pi) times (radius of the pipe)2 x (length of the pipe)(Remember that the radius is 1/2 of the diameter.)With that formula, you can find the volume of any length of pipe. You know thediameter in inches, so the volume will be in cubic inches.One gallon is exactly 231 cubic inches. Find what the length of the pipe has to bein order to have a volume of 231 cubic inches.Go to it ! You can do it !
The volume of the pipe is 1,154.5 cubic feet.
A pipe has the shape of a cylinder; just use the formula for the volume of a cylinder. In metric units, you have the advantage that the units are consistent. For example, if the radius and height of the cylinder are measured in decimeters, the volume will be in cubic decimeters (= liters).
measure the radius of the pipe. (half the diameter - the width of the pipe) then measure the length of the pipe. then use the formula pi (3.14) x radius2 x length. the answer is the volume in the pipe