A steel tube (E= 200Gpa) has an internal diameter of 40 mm, thickness – McqOptions

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1.	A steel tube (E= 200Gpa) has an internal diameter of 40 mm, thickness 10 mm and a length of 2 m. If it is subjected to an axial pull of 80 kN, the change in length of the tube will be__ _mm.
A.	0.283
B.	0.5
C.	0.85
D.	0.113
Answer» C. 0.85

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