Re: OT: Converting miles/km

Christian Weisgerber <naddy@mips.inka.de> wrote:

On 2024-09-19, Christian Weisgerber <naddy@mips.inka.de> wrote:
 

Yes, the natural logrithm of 5 approximates the conversion factor
between miles and kilometers; specifically one mile is about ln(5)
kilometers.

 
PS:
 
"The Maritime Approximation"
https://xkcd.com/3023/
 
  pi mph = e knots

Why would a sailor, or a pilot, want to know about miles?
There is of course no need to drag time into it.
It can be simplified to pi landlubber miles
equals e seaman miles,

Jan