18156. Discharge (Q) of a centrifugal pump is given by (where D = Diameter of impeller at inlet, b = Width of impeller at inlet, and Vf = Velocity of flow at inlet) September 14, 2025 by Admin Q = π.D.Vf Q = π.b.Vf Q = π.D.b.Vf Q = D.b.Vf ✅ The correct answer is option C.