For a turbo jet with a flight velocity of 800 km/h at an ambient of 60 kPa, the properties of gas entering the nozzle are 300 kPa and 200C. The mass flow rate of air is 20kg/sec. assuming air (Y=1.4 and R=287 J/kg) as working fluid, find a) thrust developed, b) thrust power and c) propulsive efficiency.