###Human: John gets lost on his way home.  His normal trip is 150 miles and would take him 3 hours.  He ends up driving 50 miles out of the way and has to get back on track.  How long did the trip take if he kept the same speed?, ### Assistant: His speed is 150/3=50 mph
He was detoured 50*2=100 miles
So that adds 100/50=2 hours
So the total trip was 3+2=5 hours 
 So the answer is :  5