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Question
A round bar made of same material consists of 3 parts each of 100 mm, length having diameters of 40 mm, 50 mm and 60 mm respectively. If the bar is subjected to an axial load of 10 kN, the total elongation of the bar would be (E is the modulus of elasticity in kN/mm2.
A.
 
B.
C.
D.
Answer ( Option D)

Solution

Elongation in bar due to load P

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