A simple ideal Brayton cycle with air as the working fluid has a pressure ratio of 10.

Question:

A simple ideal Brayton cycle with air as the working fluid has a pressure ratio of 10. The air enters the compressor at 520 R and the turbine at 2000 R. Accounting for the variation of specific heats with temperature, determine
(a) The air temperature at the compressor exit,
(b) The back work ratio, and
(c) The thermal efficiency.