In article ,
Taxed and Spent wrote:

On 8/31/2017 9:00 AM, wrote:
The old 45 RPM (revolutions per minute) vinyl records were called 45's
by everyone who had them.

If we were using a metric system at that time, would they still be
called 45 rpm, or would there be some metric numbers used instead?

I was having this discussion with a few people and no one knew the
answer.....
(Personally, I think they would still be 45 rpm, but I could be wrong).


I think they would be 4.5 drpm.

The French for a time tried decimal time where there were 10 hours in a
day and 100 minutes in an hour. So in decimal minutes, or dm, it would be
64.8 rpdm or 6.48 drpdm.