The compressor work required in kJ/kg is

Question

Air (C_p= 1 kJ / kg,$\gamma$= 1.4) enters a compressor at a temperature of 27⁰C. The compressor pressure ratio is 4. Assuming an efficiency of 80%, the compressor work required in kJ/kg is                                                                               

      (a) 160                            (b) 172                         (c) 182                            (d) 225