Atank contains 1000l of pure water. brine that contains 0.04kg of salt per liter enters the tank at a rate of 5l/min. also, brine that contains 0.1kg of salt per liter enters the tank at a rate of 10l/min. the solution is kept thoroughly mixed and drains from the tank at a rate of 15l/min. answer the following questions.1. how much salt is in the tank after t minutes?
answer (in kilograms): s(t)=?
how much salt is in the tank after 5 hours?
answer (in kilograms): ?