There are 4000 pounds of water in the jacket of a reactor that are initially at 145 oF. At time equal zero, 70oF cooling water is added to the jacket at a constant rate of 500 pounds per minute. The holdup of water in the jacket is constant since the jacket is completely filled with water and excess water is removed from the system on pressure control as cold water is added. Water in the jacket is perfectly mixed. How many minutes does it take the jacket to reach 106 oF of a constant 360,000 Btu/h of heat is transferred into the jacket from the reactor, starting at time equal to zero when the jacket is at 145oF