Your mile pace was 6.56 minutes.
6.4 miles in 40.30 minutes is a pace of 6 minutes 18 seconds per mile.
The pace to run a half mile in 4 minutes 13 seconds is 7.12 (7.11462451) miles per hour.
This equates to a pace of 15 minutes 3.2 seconds per mile.
If you run 4.9 miles in 40 minutes and 23 seconds, your pace is 7.28 mph or 8.24 minutes per mile.
It will take 11 minutes 15 seconds to complete 1.8 miles at that pace.
To run 1600 meters at a pace of 10 and a half minutes per mile requires 10 minutes 26.4 seconds.
About 3 seconds in a combat aircraft, 15 minutes at a strolling pace.
The pace is 12.62 minutes per mile.
3.15 minutes which is extremely fast
A 13k race in 1 hour 11 minutes 35 seconds equates to a pace of 7 min 49 sec per mile.
36 min/3.3 miles = 10.9 minutes per mile or 10 minutes and 54 seconds per mile.