Mathematics, 18.04.2020 21:22, albattatasraap5wymy

One conveyor belt can move 1000 boxes in 9 minutes. Another can move 1000 boxes in 11 minutes. If another conveyor belt is added and all three are used, the boxes are moved in 3 minutes. How long would it take the third conveyor belt alone to do the same job?

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One conveyor belt can move 1000 boxes in 9 minutes. Another can move 1000 boxes in 11 minutes. If an...