A venturi meter which has a throat diameter of 25 mm is installed in a horizontal pipeline of 75 mm diameter conveying air. The absolute pressure at the inlet to the mater is 133.3 kPa and that at the throat is 100 kPa. The temperature of the air at the inlet 20∘C20∘C. Assuming isentropic flow determine the mass flow rate of air. (NOTE: y=1.4, R=287 J/kg.K)