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Un article trouvé pour ce sujet.
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Filling A swimming pool |
2002-11-21 |
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Sarah pose la question :
A swimming pool is being filled by three pumps. Alone pump A would take 6 hours, pump B would take 3 hours, and pump C would take 3 hours. If all three pumps are used to fill the pool, what fraction of the process is pump A.
Penny Nom lui répond. |
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