An ideal gas-turbine cycle with two stages of compression and two stages of expansion has an overall pressure ratio of 9. Air enters each stage of the compressor at 300 K and each stage of the turbine...

Extracted text: An ideal gas-turbine cycle with two stages of compression and two stages of expansion has an overall pressure ratio of 9. Air enters each stage of the compressor at 300 K and each stage of the turbine at 1300 K. Determine the back work ratio and the thermal efficiency of this gas-turbine.