In a concentric tube heat exchanger, cold water is heated by the heat released by the steam condensation. The water enters the tube at 10 0C and leaves at 50 0C. The steam pressure is maintained at 1.01325 bar (atmospheric). If the length of the tube is increased to 3 times, what would be the outlet temperature of water? Assume overall heat transfer coefficient remains constant for both the cases. Specific heat for water may be assumed to be 4187 kJ/kg-K.