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

Figure shows the schematic for the measurement of velocity of air (den

1.	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
A.	6.4
B.	9
C.	12.8
D.	25.6
Answer» D. 25.6