If the principal stresses in a plane stress problem are ơ1 = 100 MPa, ơ2 = 40 MPa, the magnitude of the maximum shear stress (in MPa) will be (a) 60 (b) 50 (d) 20 (c) 30

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A: The stepwise procedure to solve this problem is shown in the following attached image:

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A: A  B  C  D  E