If D is the diameter of impeller at inlet, w is the width of impeller at inlet and vf is the velocity of flow at inlet, then discharge through a centrifugal pump is equal to

If D is the diameter of impeller at inlet, w is the width of impeller

1.	If D is the diameter of impeller at inlet, w is the width of impeller at inlet and vf is the velocity of flow at inlet, then discharge through a centrifugal pump is equal to
A.	πDVf
B.	DVfw
C.	πDVfw
D.	πDw
Answer» D. πDw