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