Problem $08\mathrm{.}035-$ Hot combustion gases in the nozzle of a turbojet engine

Hot combustion gases enter the nozzle of a turbojet engine at $260$kPa,$747\backslash$deg C$,$ and $80($m$)/($s$),$ and they exit at a pressure of

$85$ kPa $.$ Assume an isentropic efficiency of $\backslash$eta $\_($N$)=90\mathrm{.}0$ percent and treat the combustion gases as air.

Problem $08\mathrm{.}035.$a $-$ Exit velocity of air

Determine the exit velocity. Use the table containing the ideal gas properties of air.

The exit velocity is

$($m$)/($s$).$