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Puzzles:Average

   
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Edited: 08/09/2010 04:35 PM
Picture: John Rowland
John RowlandNo presence information

Average

I set out on a journey with the intention of completing it at a certain average speed. Unfortunately my average speed for half the journey is only half the average speed I want to achieve for the whole journey.  At what average speed do I have to complete the second half of the journey to reach my target for the whole journey?
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