Question # $6.(1\mathrm{.}5$ Marks$)$ Isentropic Efficiencies of Steady$-$Flow Devices

Steam enters an adiabatic turbine at $6(MPa),600C$ and $80(\frac{m}{s})$ and leaves at $50(kPa),100C$ and $140(\frac{m}{s}).$ If the power output of the turbine is $8(MW),$ determine a$)$ the mass flow rate of the steam flowing through the turbine and b$)$ the isentropic efficiency of the turbine. $($answers: a$)8\mathrm{.}25k\frac{g}{s}$ b$)83\mathrm{.}7\%)$