Fluid mechanics question, manometers

[math_04]

1. The problem statement, all variables and given/known data

Calculate the pressure which would be measured by the pressure gauge shown in the sketch below.

2. Relevant equations



3. The attempt at a solution

The diagram and attempted solution are in the attachment. The answer on the back was 2.82 KPa.

[math_04]

oh no not again, yet another attachment pending approval, a 3 hours wait!