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A steel bar 2 m long, 20 mm wide and 15 mm thick is subjected to a tensile load of 30 KN

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A steel bar 2 m long, 20 mm wide and 15 mm thick is subjected to a tensile load of 30 KN. If the Poisson's ratio is 0.25 and Young's Modulus is 200 GPA. What is the increase in volume?