Calculate the instantaneous elongation if a steel rod of 40 mm and 4 m long subjected to an axial pull of 80 kN. Take E = 2×105 N/mm2.

Calculate the instantaneous elongation if a steel rod of 40 mm and 4

1.	Calculate the instantaneous elongation if a steel rod of 40 mm and 4 m long subjected to an axial pull of 80 kN. Take E = 2×105 N/mm2.
A.	1.23 mm
B.	1.27 mm
C.	1.31 mm
D.	1.43 mm
Answer» C. 1.31 mm