Question: A solid circular shaft is to transmit 250 kW at 120 rpm. (a) If shear stress is not the exceed 63 MPa, find its diameter.

A solid circular shaft is to transmit 250 kW at 120 rpm.

(a) If shear stress is not the exceed 63 MPa, find its diameter.

(b) If this shaft is replaced by a hollow shaft whose diameter ratio is 0.6, what percentage saving in weight shall be obtained keeping the material and maximum shear stress same.

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