Quote:
Originally Posted by red_pheonix
If we divide 120mph by the speed of 40mph it takes 3 hours to travel the distance.
If we divide 120mph by the speed of 60mph it takes 2 hours to travel the distance.
Total time is 5 hours.
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Yes, that's what happens, but the question is why doesn't dividing 240 (total distance) by 50 (average speed) give you the same answer.