In this question is h = 550 mm represent the pressure head at B ?
Use the following:
pB + (1/2)*rho*vB^2 = pA + (1/2)*rho*vA^2 pB = rho*g*h
vA*AreaA = vB*AreaB
pB + (1/2)*rho*vB^2 = pC + (1/2)*rho*vC^2 + (0.15/2)*rho*vB^2
vC*AreaC = vB*AreaB
Volume flow rate = v*Area
v is velocity, p is static pressure
Yes Alan, I applied the energy equation, but my question was about h = 550 mm is it the pressure head at B?
And this is how i solve it, maybe its not clear!