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Mathematics 11 Online
OpenStudy (anonymous):

A tank contains 1000L of bring with 15kg of dissolved salt. Pure water enters the tank at a rate of 10L/min. The solution is kept thoroughly mixed and drains from the tank at the same rate. How much salt is in the tank after t minutes?

OpenStudy (anonymous):

Im trying to set this equation up like ds/dt = rate in - rate out. I'm assuming rate in = 0 and rate out is the 10L/min. Not sure how to set this one up :l

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