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tranthinhqnam
2 năm trước
Hai đội công nhân cùng làm một đoạn đường trong 24 ngày thì xong. Mỗi ngày, phần việc đội A làm được nhiều gấp rưỡi đội B. Hỏi nếu làm một mình thì mỗi đội làm xong đoạn đường đó trong bao lâu?
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