3 hours and 45 minutes
3 hours * 60 minutes/hour = 180 minutes
240 mintues
3 hours and 40 mintues
3 hours times 60 minutes:3 * 60 = 180 minutes
150
2.1167 hours.
21 hours.
3 hours and fifteen mintues
90
60 minutes = 1 hour 460 minutes = 460 ÷ 60 = 72/3 hours.
there are 11 hours and 40 mintues :)