Calculate the power of the engine, Mechanical Engineering

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A Torsion dynamometer is used in a propeller shaft of a marine Engine. It is found that the shaft twists 2o in a length of 20 meters at 120 r.p.m. If the shaft is hollow with 300 mm internal diameter and 400 mm external diameter, Calculate the power of the engine. Take modulus of rigidity as 80GPa.


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