His speed is 150/3=<<150/3=50>>50 mph

He was detoured 50*2=<<50*2=100>>100 miles

So that adds 100/50=<<100/50=2>>2 hours

So the total trip was 3+2=<<3+2=5>>5 hours

# Answer

5
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
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?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
5
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?
train