The figure below shows the rotation of the blade attached to the hub of the Kaplan turbine. The blade and the fluid velocities are shown in the figure.

The magnitude of absolute velocity at entry is 330 m/s at an angle of 72° to the direction of flow velocity at the entry of the turbine blade, while the magnitude of the absolute velocity at exit is 165 m/s. The tangential velocity of the blade at any particular section of the blade is 160 m/s. The exit absolute velocity vector has a whirl component in the downward (tangential) direction and a flow component in the radial direction. The specific work output from the turbine will be? 

1
62 kJ/kg
2
71 kJ/kg
3
71 J/kg
4
49 kJ/kg

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