A steel rod (60 mathrm{~mm}) in diameter and (2 mathrm{~m}) long is subjected to a pull of

Question:

A steel rod $60 \mathrm{~mm}$ in diameter and $2 \mathrm{~m}$ long is subjected to a pull of $120 \mathrm{kN}$. It the strain is to increase by 10 percent, find the length of $20 \mathrm{~mm}$ diameter bore under the same pull. Take $E=210 \mathrm{GPa}$

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