The answer is 90, 25, 155, 115 respectively
1 hour and 48 minutes plus 1980/550=3.6 so 3 hours and 36 minutes plus 30 minutes so 48+30=1 hour and 18 minutes plus 1 hour = 2 hours and 18 minutes + 3 hours and 36 minutes =5 hours and 54 minutes hope I helped
