the 255 min would turn to an 1 hour and 5 min
4.25 hours
0 hours are in 20 min an hour is 60 min
8 hours, 20 minutes
610 min / 60 = 10.167 hours.
10 days and 15 hours.
2 hours
5 hours, 50 minutes
60 min = 1 hour so 375 min = 6 hours 15 minutes.
It depends on your speed.
255
320 min = 51/3 hours = 5hours 20minutes