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某容器原有 5千克清水,将含有浓度为5% 的盐水流入该容器．流入的速度为2千克／分，在塘中充分溶解后又以2千克／分的速度流出容器．问经过多长时间容器盐水浓度达到 4%?

There is 5kg water in the container,the concentration of 5% brine flows into this container and the velocity is 2kg/min.After dissolved completely,it flows out of the container in the velocity of 2kg/min.Question:when will the concentration of brine get to 4%?

Some container original 5,000 grams of clear waters, will imply the density to flow into that container for 5% brine. influent speed for 2,000 grams of/ divide, after pond in full deliquescence again with 2,000 grams of/ cent of the speed run off container. ask to attain 4% through many densities of long-playing container brine?

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There is 5kg water in the container,the concentration of 5% brine flows into this container and the velocity is 2kg/min.After dissolved completely,it flows out of the container in the velocity of 2kg/min.Question:when will the concentration of brine get to 4%?

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