The below figure shows a multi-tube manometer using water and mercury that is used to measure the pressure of air in a vessel. It is given that h1 = 0.4 m, h2 = 0.5 m, h3 = 0.3 m, h4 = 0.7 m. h5 = 0.1 m and h6 = 0.5 m. Assuming the density of water to be 1000 kg/m3 & the density of mercury to be 13600 kg/m3, for the given values of heights, the gauge pressure in kN/m2 will be:

The below figure shows a multi-tube manometer using water and mercury

1.	The below figure shows a multi-tube manometer using water and mercury that is used to measure the pressure of air in a vessel. It is given that h1 = 0.4 m, h2 = 0.5 m, h3 = 0.3 m, h4 = 0.7 m. h5 = 0.1 m and h6 = 0.5 m. Assuming the density of water to be 1000 kg/m3 & the density of mercury to be 13600 kg/m3, for the given values of heights, the gauge pressure in kN/m2 will be:
A.	90
B.	1900
C.	19
D.	190
Answer» E.