[weird-eye-issue]

I've never seen 45m to mean minutes

[happytoexplain]

I see XXm for minutes all the time (USA), but definitely not in contexts like this where it is easily confused for miles (edit: or meters).

[SnowHill9902]

It’s used for elapsed time not for time intervals. They have the same units but different usage.

[labster]

How did it take them three quarters of an hour to walk only 45 meters?

[weird-eye-issue]

Is that context in the title?

[lstamour]

I was about to say I’ve seen it, but nope, I agree. Even putting it in context, like “1m43s” isn’t something I’d see often. “1 min. 43 sec.” is what I would expect.