A metal bar of 40 mm x 40 mm section is subjected to a tensile load of 320 kN. The extension of a 200 mm gauge length is found to be 0.2 mm and the decrease in thickness of 0.012 mm. The lateral and longitudinal strains are _________ respectively.
1
3 x 10-4, 10 x 10-4
2
10 x 10-4, 3 x 10-4
3
3 x 10-4 mm, 10 x 10-4 mm
4
3 x 10-4 mm, 10 x 10-3 mm