Question 859553
The stopped/down time is irrelevant to the driving time. 
1375/55=25 hours driving. 
If you had asked for the time for the trip including down time. 
1375/165= 8 1/3
so you stopped 8 times for 30 minutes which is 4 hours of stopped time.
You stopped for 30 minutes every three hours.
so that would be 29 hours for the trip.