A centrifugal pump runs at the speed of 1450 rpm and discharges 0.118 m3/s of water. The pump works against the head of 25 m. The impeller radius is 12.5 cm, its width at the outlet is 5 cm and manometric efficiency is 75%. The vane angle in degrees at the outer periphery of the impeller is:.

A centrifugal pump runs at the speed of 1450 rpm and discharges 0.118

1.	A centrifugal pump runs at the speed of 1450 rpm and discharges 0.118 m3/s of water. The pump works against the head of 25 m. The impeller radius is 12.5 cm, its width at the outlet is 5 cm and manometric efficiency is 75%. The vane angle in degrees at the outer periphery of the impeller is:.
A.	79.77
B.	39.77
C.	49.77
D.	59.77
Answer» E.