Question

Multiple choice question- just checking! (;
Ms. Chang traveled 320 miles by train. The train traveled at a rate of 80 miles per hour and made 4 stops that averaged about 30 minutes each. How long did the trip take, including stops?
F) 3.3 hours
G) 4 hours
H) 5.5 hours
J) 6 hours
Please explain. Thank you for your help! As I said, it is just a check, but I would like an explanation, too. I'll award medal to the best answer! (;