Answer:
3h and 12min = 3.2h
Step-by-step explanation:
From 6:05 to 7:00 there are 55 minutes.
From 7:00 to 9:00 there are two hours.
From 9:00 to 9:17 there are 17 minutes.
Therefore we have
2h + 55min + 17min = 2h + 72min = 2h + 60min + 12min = 2h + 1h + 12min
= 3h + 12min = 3h + 12/60h = 3h + 1/5h = 3h + 0.2h = 3.2h
1h = 60min → 1min = 1/60h
