It's all relative, but the average occasional runner should take about 16-20 minutes. If it takes you more then 20 minutes, you're not a runner.
8.4kph is 5.22mph 2/5.22 is 0.383 hrs or 23 mins
About 23 minutes.
23/75 = 18minutes 24seconds
23/50 hour = 27minutes 36seconds
21 minutes, 13.85 seconds
It depends how fast you're going
Asuming you can maintain exactly 60 mph for the whole trip it will take you exactly 23 minutes.
3 hours 50 minutes.
3 hours 23 minutes.
1 hour 23 minutes.
an hour if your driving seventee four miles per hour.
6 hours 23 minutes.