From the following data, calculate the critical speed of the shaft in rps.Shaft diameter = 5mmlength = 200mmMass of disc = 50Kg at centre of shaftE = 200GN/m2Centre of disc at 0.25m away from centre of axis of shaft.

From the following data, calculate the critical speed of the shaft in

1.	From the following data, calculate the critical speed of the shaft in rps.Shaft diameter = 5mmlength = 200mmMass of disc = 50Kg at centre of shaftE = 200GN/m2Centre of disc at 0.25m away from centre of axis of shaft.
A.	8.64
B.	9.64
C.	10.64
D.	11.64
Answer» B. 9.64