The digestion process of hippopotamus $($hippopotamus$)$ takes place with the reaction that occurs in the intestines after the reaction in the stomach. This situation can be modeled as a series connection of a fully stirred continuous reactor $($CSTR$)$ and a plug flow reactor $($PFR$).$ The nutrient enters the system at a volumetric flow rate of $100$ liters $/$ day and a concentration of $7\mathrm{.}5$ mol $/$ liter. The volume of the stomach $($can be modeled as CSTR$)$ is $450$ liters. The graphs of the reaction rates $($mol $/$ liter.day$)$ versus the reactions taking place in the stomach $($CSTR$)$ and intestines $($PFR$)$ are given below. Since the total conversion is $50\%,$ how many liters is the volume of the intestines $($PFR$)$MiDF

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