Re: OT: Converting miles/km

On 20/09/2024 11:10, Bertel Lund Hansen wrote:

Helmut Richter wrote:
 

And easier to remember than 1.609344. But when will you need such precision?
For instance, when you drive on German roads outside villages, you must
reduce your speed to 31.0685 mph whereas the rough rule 1 mi = 1.6 km would
have allowed you 31.2500 mph.

 I haven't neede it, but just for fun I have calculated the Danish speed
limits in miles. If you want round firgures, it's:
      50 km = 30 mi
     80 km = 50 mi
   110 km = 70 mi (2 km too much)
   130 km = 80 mi
 

I was more than a little surprised, just this morning, to find that in my local branch of Halfords, for a mere £3.99, I can buy a handy guide to stick on my windscreen:
<https://www.halfords.com/motoring/travel-accessories/travel-equipment/speedright-safety-device-181812.html?stockInventory=undefined>
I can't help wondering who, in the 21st century, is expected to buy this "safety device".
--
Phil B