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At a factory, 7 identical machines,working independently, produce cat litter at the same constant rate. Working simultaneously, 5 of the machines take 14 minutes to produce 2,400 pounds of cat litter.How many minutes does it take all 7 machines, working simultaneously, to produce 3,600 pounds of cat litter?
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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。
