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Un article trouvé pour ce sujet.
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Two ferry boats |
2001-03-25 |
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Gil pose la question :
Two ferry boats leave from opposite shores. One is faster than the other. They meet 720 yards from the nearest shore. They proceed to destination and upon returning they meet 400 yards from the other shore. What is the exact width of the river.
Penny Nom lui répond. |
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