For example a tube (hollow cylinder)with wall thickness 't' the outside diameter is: 1.00+2t So if the walls are 1.0mm thick the outside diameter is 1.20cm If there is no wall thickness the inside and outside diameter are the same. This seems a little too simple a question to ask here so I suspect the person asking the question has omitted some details or that they want an answer to a different question.
how long is it? 5.026 litres / metre ignore the outside (10cm), it's unimportant
For a circle with a diameter of 100 cm, the area is ≈ 9,503.32 cm2
The volume of a glass cylinder with an inside diameter of 6.0 cm and height of 28 cm is 791.68 cubic cm.
Diameter-0.016 cm Height-0.26 cm
2 meters
Area = pi*502 square cm
200
First, think about what a diameter of a circle is. It is a line drawn through the middle of a circle from one side to the other. Is a pipe shaped like a circle? Yes, so you can use diameters of a circle to figure this out. Second, draw a circle like the inside of the pipe. Draw a straight line through the middle from one side to the other. Write 10 cm above it. Third draw a circle around the first circle. Draw a line to one end if the first line. Write 1 cm above it. Fourth, do the same on the other end of the first inside line and write 1 cm above it. You should have a line that goes through the middle and all the way to the outside circle. Now, look at what you have: 1 cm on the outside + 10 cm on the inside + 1 cm again on the other outside. If this seems tricky run your finger along the line to see how it works. What do you have? 1 cm + 10 cm + 1 cm = 12 cm. 12 cm is the answer.
The radius measures from the center of the circle to the perimeter (outside), so if the radius is 8.5 cm that would make the diameter of the circle 17 cm. (8.5 cm X 2 = 17 cm)
It is 10 cm.
Dimensions: Inside Diameter Of Mouth Opening: 1.4in (36mm)Outside Diameter Of Mouth Opening: 2.1in (53mm)Height: 19in (48.3 cm)Diameter: 10.5in (26.67 cm) at widest point
Diameter = 68 cm => circumference = pi*d = 213.63 cm = 2.1363 m To travel 100 m the wheel makes 100/2.1363 = 46.81 revs.