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I have to find the pressure at point B, within the manometer.

height A=0.71m

height B=200mm

p(roh)=882 kg/m^3

p(roh)m=13784 kg/m^3 (is this the density of the gas?)

Pressure at point A=156850Pa

I have tried using the following equation: P1-P2=pg(h2-h1), is this correct?

The answer im getting is 18196.73 Pa, but im not including p(roh)m in the equation.

I hope what im trying to ask makes sense.

If anybody can help, and maybe push me in the direction of a few websites, it would be mostly appreciated.