In an ideal Rankine cycle, the enthalpy of steam at the inlet of turbine is 3200 kJ/kg and that at the outlet of pump it is 200 kJ/kg. The entropy of steam at the exit to boiler is 7.15 kJ/kg-K and that at the inlet to boiler is 7.15 kJ/kg-K and that at the outlet of pump it is 0.615 kJ/kg-K . The temperature of heat addition (mean) for the cycle is