A solid transmission shaft is 88.9 mm diameter. It is desired to replace it with a hollow shaft of the same material and same torsional strength but its weight should only be half as much as the solid shaft. Find the outside diameter and inside diameter of the hollow shaft in mm. A. 76.175 & 38.2 B. 66.175 & 28.2  C. 107.31 & 86.97 D. 86.175 & 48.20

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Torsion

In mechanical engineering, torque, torsion, and twisting moment are three of the most important concepts which have different meanings. Torque is the consequence of a moment of a force that produces an angular acceleration in a body or induces rotational kinetic energy in a body. For instance, in an automobile, the power transmission shaft is a body that is always under rotation due to the external torque acting on it, this torque is created by the engine.