Trong đợt mưa vừa qua,cánh đồng lúa quê em bị ngập úng.Các bác trong đội thủy nông đã phải dùng 2 máy bơm nước liên tục trong 24h để cứu lúa.Vì muốn công việc hoàn thành sớm hơn nên các bác phải dùng 6 máy bơm nước như thế.Vậy sau mấy giờ sẽ bơm được nước theo yêu cầu?

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