Manometer problem solving.

[aaronfue]

Homework Statement

Two pipes are connected by a manometer shown in the figure.

Homework Equations

F_R = $\gamma$*h_c*A

y_R = y_c + $\frac{I_xc}{y_c*A}$

The Attempt at a Solution

P_B - P_A = $\gamma$_water*1.1m - $\gamma$_Fluid*0.6m + $\gamma$_water*0.8m = 3.33 kPa

I checked my answer and it was all okay except the answer was supposed to be -3.33 kPa. Can someone brief me on why that is?

 

[Chestermiller]

The problem asked for PA-PB, and you calculated PB-PA.