Explanation:
This sort of question is much easier to answer if you have a few numbers and one concept or equation at your fingertips. First, remember that for a manometer P= rho g h. You can see this,if you like, be writing Bernoulli's equation with the velocities set to zero. Second, atmospheric pressure is about 14.7 psi or 10.3 m of water. Then, the problem is just one of converting units 12.7 psi = 8.9 m water = 1.27 m of the fluid under examination.
