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
It is: 12/pi = 3.8197 inches rounded to 4 decimal places
Assuming the 80 inch is the outside measurement and not the internal bore size. Formula is Circumference = radius squared timed by pi (3.1416) 40 × 40 × 3.1416 = 5026.56 inches
The circumference of a 7-inch circle is: 21.99
The circumference of a 10 inch circle is: 31.416 inches(circumference = diameter x pi).
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
The answer depends on what the "36 inch" measures: inside circumference, radius, diameter?
It is 47.1 inches.
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The circumference of a six-inch diameter circle is: 18.8 inches.
"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.
You need to know both length and circumference of the inside part of the pipe.
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).
The volume of water in 1,500 feet of six-inch pipe is: 294.52 cubic feet or 2,203.2 US gallons.
Three inches
The pipe will have an outside diameter of 1.5+.25+.25 = 2". A pipe with an outside diameter of 2" has an outside circumference of 2"*Pi. 2"*3.142 ~= 6.284" or about 6 1/4"
It is: 12/pi = 3.8197 inches rounded to 4 decimal places