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Posted by on Sunday, January 29, 2012 at 6:29pm.

Its 80 kilometers from point A to point B. Someone travels at an average speed of 40 kilometers per day and takes a negligible amount of time at point B to turn around to head back to point A. At what average speed must the person travel back to point A so that for the entire round trip journey, their average speed is 80 kilometers per day.

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