36. A bar having a cross-sectional area of 700 mm
2is subjected to axial loads at the
positions indicated. The value of stress in the segment QR is:
63 kN 21 kN
35 kN 49 kN
P Q R S
(A) 40 MPa
(B) 50 MPa
(C) 70 MPa
(D) 120 MPa
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