plase solve that now

where A is cross-section area of cylindrical tank in m2,h is the liquid level inside the cylindrical tank in m.a is the percentage of Fout(1) re-circulating into the tank. You as an engineer is requested to control the mixing system shown above. The system is mixed between hot stream at temperature TH in C with the flow rate FnHHot in m3/h, cold stream at temperature TCC with flow rate FmCold in m3/h and a circular percentage flow rate from reactor into the reactor which temperature is TC and volume Vm3. Assumed that the mixing is perfect. the temperature TC at any point in the reactor is similar to temperature going out from the reactor TC. It is assumed that density, heat capacity are constant. From thermodynamic class you know that the the mixing temperature of hot and cold stream is laying in between cold and hot temperature TC