Answer:
4.17 hours before lunch
Explanation:
Ellen has 4 classes before lunch break, which means she has 3 passing periods between those classes. Each passing period is 10 minutes long, so the total time for passing periods is 3 x 10 = 30 minutes.
The duration of each class is 55 minutes, so the total time for 4 classes is 4 x 55 = 220 minutes.
To find the total time Ellen spends in class and passing periods, we need to add the time for the classes and the time for the passing periods:
Total time = time for classes + time for passing periods
= 220 minutes + 30 minutes
= 250 minutes
To convert the time to hours, we can divide by 60:
Total time in hours = 250 minutes ÷ 60
≈ 4.17 hours
Therefore, Ellen's classes start approximately 4.17 hours before lunch break.
I hope this will help you!