The mass flow rate (in kg/s) of air required in the cycle is

Question

In an ideal Brayton cycle atmospheric air (ratio of specific heats, C_p / C_v = 1.4 specific heat at constant pressure = 1.005kJ/kg.K) at 1 bar and 300 K is compressed to 8 bar. The maximum temperature in the cycle is limited to 1280K. If the heat is supplied at the rate of 890MW, the mass flow rate (in kg/s) of air required in the cycle is