A hollow shaft has to transmit 6MW at 150 rev/min. The maximum allowable stress is not to exceed 60MN/m2 nor the angle of twist 0.3deg per metre length of shafting. If the outside diameter of the...

A hollow shaft has to transmit 6MW at 150 rev/min. The maximum allowable stress is not to exceed 60MN/m2 nor the angle of twist 0.3deg per metre length of shafting. If the outside diameter of the shaft is 300mm find the minimum thickness of the hollow shaft to satisfy the above conditions. G = 80 GN/m2. (20 Marks)