In case of a Medium runner, tan (Î±1) CANNOT be given by (Î±1 = Guide vane angle at inlet)?

In case of a Medium runner, tan (Î±1) CANNOT be given by (Î±1 = G

1.	In case of a Medium runner, tan (Î±1) CANNOT be given by (Î±1 = Guide vane angle at inlet)?
A.	vf1 / vw1
B.	vr1 / vw1
C.	vr1 / u1
D.	vw1 / u1
Answer» E.