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Un article trouvé pour ce sujet.
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Two racers going around a track |
2009-02-26 |
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larisa pose la question :
One racer makes a complete trip around the track every 28 seconds, while the other racer completes a trip around the track every minute. How many times will the first racer pass the second racer in 30 minutes?
Robert Dawson lui répond. |
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