Physics

Physics, 17.07.2019 02:10, davidtemple

Initially 5 grams of salt are dissolved in 20 liters of water. brine with concentration of salt 2 grams of salt per liter is added at a rate of 3 liters a minute. the tank is mixed well and is drained at 3 liters a minute. how long does the process have to continue until there are 20 grams of salt in the tank?

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