"Dave Smith" wrote
Default User wrote:

Stupid example, though. If you're going 100 MPH, a 500 mile
trip also takes five hours. If you're only using one set of
units, it doesn't make any difference what they are.

More practically, 60MPH is a mile a minute, and very easy to work with.

Yes, but then you have to divide by 60 to know how many hours
that work out to. 375 km at 100 kph is 3.75 hours. or 3 hours 45
minutes, while 375 mile requires division rather than just
sticking in a decimal point. 6 with a remainder of 15.

I am used to the metric system. When I am en route to a city and
see the destination signs and it says for example 122 km.....
that is 1.2 hours. ..... and I instantly know I am just over an
hour a way.

If you are 23 km away how long will it take to get there at 100 kph?
When I am 23 miles away I instantly know I am 23 min away @ 60mph

What ever happened to the dual unit traffic signs?