Answer:
2 hrs 41 minutes
Explanation:
6:39 am to 6:40 am is 1 minute
6:40 am to 7:00 am is 20 minutes
7:00 am to 9:00 am is 2 hrs
9:00 am to 9:20 am is 20 minutes
add the minutes
1 + 20 + 20 = 41 minutes
add the hours
2 hrs
total time
2hrs+ 41 minutes
2 hrs 41 minutes