A uniform steel bar Young s modulus 200 GPa density 7 8 gm cc of total length 40 m hangs vertically The ratio of elongation of

Question

A uniform steel bar Young s modulus 200 GPa density 7 8 gm cc of total length 40 m hangs vertically The ratio of elongation of top 10 m to that of top 20 m of the bar OFFICE COPY D 7 12 would be A 1 2 C 5 8

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