Problem No: 3 The mixing tank shown here initially contains 50 kg of water at 25 C. Suddenly, the two inlet valves and the single outlet valve are opened, so that the two water streams, each with a flow rate of 5 kg/min, flow into the tank, and a single exit stream with a flow rate of 10 kg/min leaves the tank. The temperature of one inlet stream is 80 C and that of the other one is 50 C. The tank is well mixed, so that the temperature of the outlet stream is always the same as the X temperature of the water in the tank. Develop an expression for the temperature of the fluid in the tank at any time