2. Gas is flowing through a square conduit whose section gradually changes from 150 mm (section 1) to 300mm (section 2). At section 1, the velocity of flow is 7 m/s and the density of gas is 1 kg/m while at section 2, the velocity of flow is 2 m/s. Calculate the mass flow rate and the density of the gas at section2. A-1 kpin 150mm 150 mm 2 300mm 300 mm