1 hour = 60 minutes
1.5 hours = 90 minutes
6 hours (15 minutes are left over) or 6 and 1/4 hours.
3 hours and 45 minutes
240 mintues
150
21 hours.
2.1167 hours.
90
there are 11 hours and 40 mintues :)
1.4 hours = 84 minutes
About 2 hours and 10 mintues or so
900 seconds.
1,440 minutes.