In: Civil Engineering
4. A 1000 litrecontainmenttankcatches the outflowfrom a processing apparatus whichhas 800 litresof water with2 gof chemical agentdissolved in it. Additional supplycomesinto the tank at 3 litres/hr containing5 g/litreof the chemical agent. The solution leaves thecontainmenttank at 3 litres/hr. When the amount of chemical agentin the containment tankreaches 500 g, no more supplyis allowed to enter the system. Instead,fresh water is input intothe tank at 2 litres/hr; andat the same time,the outflow is increased to 4 litres/hr. How much chemical agentis heldin thecontainmenttankat any time t.Assume all liquids are well-mixed.(10marks