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?
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
#### 5