GATE Mechanical Engineering(ME) 2011 Solved Paper

Figure shows the schematic for the measurement of velocity of air (density = 1.2 kg /m³ ) through a constant–area duct using a pitot tube and a water-tube manometer. The differential head of water (density = 1000 kg /m³) in the two columns of the manometer is 10mm. Take acceleration due to gravity as 9.8m/ s² . The velocity of air in m/s is