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I need the answer as soon as possible A bar of thickness 30 mm and having a rectangular cross-section carries a load of 82.5 kN.

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A bar of thickness 30 mm and having a rectangular cross-section carries a load of 82.5 kN. Determine (a) the minimum width of the bar to limit the maximum stress to 200 MPa, (b) the modulus of elasticity of the material of the bar if the 140 mm long bar extends by 0.8 mm when carrying a load of 250 KN

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