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A hollow shaft with 30 mm outside diameter, is required to transmit 1 kW at 60 rpm. The working stress is 50 MPa. The

A hollow shaft with 30 mm outside diameter, is required to transmit 1 kW at 60 rpm. The working stress is 50 MPa. The inside diameter of the shaft is (a) 24 mm (c) 30 mm (b) 28 mm (d) 35 mm

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