Answer:
1 hour and 40 minnutes.
Explanation:
If you mean 45 minutes, then here you go:
First, take 5 minutes from the 45 and give it to the 55, which will make the 55 into 60 and the 45 into 40. Now, you have 60 and 40, which equals 100 minutes, or 1 hour and 40 minutes.