[TorpX]

Let's decree that the ratio between the diameter and circumference of a circle must be 10 for ease of calculation!

RR makes a good point.

In many cases, one system is as good as another. I learned the metric system in school and liked it at the time, but don't see any advantage to it now. There are many physical constants which do not fit well in any system. Like the acceleration of gravity, g, or the speed of light, c, or Avagodro's number, etc. Civilization does not collapse because there are 24 hours in a day, months are not equally long, or there are 365.25 days in a year. (One of the things I like about the English system, for example, is that in physics, a foot-pound is easier to visualize than a Joule.)

BTW, I always thought it curious that the KM used metric-meters and English knots. Can anyone explain this?