1)

2)

3)

4)

5)

A structural member under loading has a uniform state of plane stress which in usual notations is given by =3P, =-2P and t = 2P, where P>0. The yield strength of the material is 350 MPa. If the member is designed using the maximum distortion energy theory, then the value of P at which yielding starts (according to the maximum distortion energy theory) is (A) 70 MPa (B) 90 MPa (C) 120 MPa (D) 75 MPa