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Working simultaneously at their respective constant rates, pump $$P$$ and pump $$S$$ together pumped out $$\frac{2}{3}$$ of the water in a full tank in 1 hour 20 minutes. Pump $$P$$ then stopped working, and pump $$S$$, working alone at its constant rate, pumped out the rest of the water in the tank in 50 minutes. How many hours would it have taken pump $$P$$, working alone at its constant rate, to pump out all the water in the full tank?
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· 相关考点
2.5.2 工作效率题
2.5.2 工作效率题
以上解析由 考满分老师提供。
