An adiabatic diffuser at the inlet of a jet engine increases the pressure of the air that...

An adiabatic diffuser at the inlet of a jet engine increases the pressure of the air that enters the diffuser at 13 psia and 30°F to 20 psia. What will the air velocity at the diffuser exit be if the diffuser isentropic efficiency is 82 percent and the diffuser inlet velocity is 1000 ft/s?