Air flows steadily through a one-inlet, one-exit control volume. At the inlet, which has a flow area of 28 cm2, the air is at 600 kPa, 500 K, and has velocity of 30 m/s. At the exit, the pressure is 300 kPa, the temperature is 456.5 K, and the velocity is 300 m/s. Assuming that the air behaves as an ideal gas, determine the following
a) the mass flow rate (kg/s), and
b) the exit flow area (cm2).