If a bar of two sections of different diameters of same length are in a line and

Question

If a bar of two sections of different diameters of same length are in a line and P load is acting axially on them then what will be the change in length of the bar?

Options:

A . PL/E x (1/A₁ + 1/A₂)

B . P/E x (1/A₁ + 1/A₂)

C . P/EL x (1/A₁ + 1/A₂)

D . PE/L x (1/A₁ + 1/A₂)

Answer: Option A
Answer: (a).PL/E x (1/A₁ + 1/A₂)

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