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A 16 mm diameter bar elongates by 0.04% under a tensile force of 16 kN. The average decrease in diameter is found to be 0.01%. Then:                                            

1. E = 210 GPa and G 77GPa

2. E = 199 GPa and 0.25

3. E = 199 GPa and 0.30

4. E = 199 GPa and G 80GPa

Which of these values are correct?

         (a) 3 and 4                          (b) 2 and 4

         (c) 1 and 3                          (d) 1 and 4

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