A composite rod is 1000mm long, its two ends are 40mm² and 30mm² in ar

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A composite rod is 1000mm long, its two ends are 40mm² and 30mm² in area and length are 300mm and 200mm respectively. The middle portion of the rod is 20mm² in area. If the rod is subjected to an axial tensile load of 1000N, what will be its total elongation (E = 200GPa)?

Options:

A . 0.145mm

B . 0.127mm

C . 0.187mm

D . 0.196mm

Answer: Option D
Answer: (d).0.196mm

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