Well, calculating the square footage of a pipe is a lot like painting a happy little tree. First, you measure the circumference of the pipe using a tape measure. Then, you use a simple formula to find the area of the pipe's cross-section: Area = πr^2, where r is the radius of the pipe. Just remember, there are no mistakes, only happy accidents in math and painting!
The formula for working out the circumference of a circle (like a pipe) is diameter times pi. (You should find pi on your calculator, if not, it is 3.14159265) Since you know the circumference, you divide the circumference (5inch) by pi (3.14159265), and you get the diameter, i.e. the size pipe. While the above formulas are correct, using this equation example will not tell you what size pipe you have. There are a number of factors involved in determining the correct answer. There are many different materials that pipe is made out of and some of these affect the dimensions of the pipe. As an example, the actual outside diameter of 1" copper pipe and 1" steel pipe are not the same. If you are talking about steel pipe, it is important to understand that all pipe 12 inch and under is referred to as "nominal" pipe size. In this case, the outside diameter of 12 inch pipe is actually 12.75 inches. For the original question asked above, the 5 inch circumference would equal 1-9/16" outside diameter which would be the equivalent of 1-1/4" pipe (nominal).
It is 47.1 inches.
The answer depends on what the "36 inch" measures: inside circumference, radius, diameter?
"4 inch" would usually refer to the diameter in such cases. You can multiply that by pi (which is about 3.1416) to get the circumference.
Find the circumference of the exterior of the pipe, then find the circumference of the interior. subtract the two to find the thickness of the pipe. then multiply the length of the pipe. Now you have the mass of the pipe, so calculate that into the weight of steel or aluminum or whatever the pipe is made of.
Circumference divided by pi equals diameter. Pi X Diameter=Circumference.
The circumference of 12-inch pipe is: 37.7 inches. (C = d x Pi)Since 12 inch pipe is a nominal size and its outside diameter is 12.75 inches, the circumference of 12 inch pipe actually is : 40.035 inches
Well, calculating the square footage of a pipe is a lot like painting a happy little tree. First, you measure the circumference of the pipe using a tape measure. Then, you use a simple formula to find the area of the pipe's cross-section: Area = πr^2, where r is the radius of the pipe. Just remember, there are no mistakes, only happy accidents in math and painting!
circumference = 2*pi*radius or pi*diameter
The formula for working out the circumference of a circle (like a pipe) is diameter times pi. (You should find pi on your calculator, if not, it is 3.14159265) Since you know the circumference, you divide the circumference (5inch) by pi (3.14159265), and you get the diameter, i.e. the size pipe. While the above formulas are correct, using this equation example will not tell you what size pipe you have. There are a number of factors involved in determining the correct answer. There are many different materials that pipe is made out of and some of these affect the dimensions of the pipe. As an example, the actual outside diameter of 1" copper pipe and 1" steel pipe are not the same. If you are talking about steel pipe, it is important to understand that all pipe 12 inch and under is referred to as "nominal" pipe size. In this case, the outside diameter of 12 inch pipe is actually 12.75 inches. For the original question asked above, the 5 inch circumference would equal 1-9/16" outside diameter which would be the equivalent of 1-1/4" pipe (nominal).
31.4159inches
They can measure the circumference of the pipe and divide it by pi or 3.14 to get an approximate answer
It is 47.1 inches.
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diameter times 3.14159
To find this you need to imagine the pipe slit straight down and rolled out. At this point what you have is 10 right triangles, with the base of the triangle being the circumference of the pipe and the height of the triangle being the height of the pipe divided by the number of wrappings. The hypotenuse then is the length of one wrapping. Multiply that number by the number of wrappings and voila, you have the length of the wire.