Question

what is the rate unit of running 4 laps in one minute

Answer 1

The unit rate of running 4 laps in one minute is :

4 laps per minute = 4 laps/min

If you want the inverse rate, that is minutes per lap,, the answer is:

1 minute/ 4 laps = 0.25 minutes per lap = 0.25 min/lap.