The perfect score is: 10 minute 10 second;
90 minutes is: 10 minutes and 50 seconds;
80.2 minutes is: 1 1 min 30 seconds;
70.3 minutes is: 13 minutes and 42 seconds;
60 minutes is: 13 minutes and 47 seconds.
A score greater than 13 minutes and 47 seconds is a failure.
It is recommended to keep breathing at a constant speed at the beginning and gradually accelerate for 3-4 minutes in the last lap.