| “DiffEq Greatest Hits” |
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| A
tank contains 1000 liters of brine (salty water) with 50 kg of |
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| dissolved
salt. Pure water enters the tank at the rate of 25 liters |
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| per
minute, The solution is kept thoroughly mixed and drains at |
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| an
equal rate. How many kg of salt remain in the tank after 10 |
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| minutes? |
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