Again?
Answer:
40 minutes of blank time
Step-by-step explanation:
1 hour 35 min + 1 hour 45 min.
35 min + 45 min = 80 min
80 min - 60 min = 20 min
35 min + 45 min = 1 hour 20 min
1 hour + 1 hour + 1 hour, 20 min = 3 hours, 20 minutes
4 hours - 3 hours, 20 minutes
4 hours - 3 hours = 1 hour
1 hour - 20 minutes
1 hour = 60 minutes
60 minutes - 20 minutes = 40 minutes
