PROBLEM 3.20 Shaft AB has a 30-mm diameter and is made of a steel with an allowable shearing stress of 90 MPa, while shaft BC has a 50-mm diameter and is made of an aluminum alloy with an allowable shearing stress of 60 MPa. Neglecting the effect of stress concentrations, determine the largest torque T that can be applied at A.
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Fill in the blank(s) with correct word