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Beginning at time t=0, fresh water is pumped at the rate of 8 L/min into a...

Beginning at time t=0, fresh water is pumped at the rate of 8 L/min into a 200-L tank initially filled with brine. The resulting less-and-less salty mixture overflows at the same rate into a second 200-L tank that initially contained only pure water, and from there it eventually spills onto the ground. Assuming perfect mixing in both tanks, when will the water in the second tank taste saltiest? And exactly how salty will it then be, compared with the original brine?

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