On a rainy day of \(20^{\circ} \mathrm{C}\), the length of a steel track is \(20 \mathrm{~m}\). what will be its length on a hot day with temperature of \(40^{\circ} \mathrm{C}\) ?

[Coefficient of linear expansion of steel \(\left.=1.1 \times 10^{6} \mathrm{~K}^{-1}\right]\)

A. \(20.009 \mathrm{~m}\)
B. \(20.002 \mathrm{~m}\)
C. \(20.013 \mathrm{~m}\)
D. \(20.004 \mathrm{~m}\)  

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Correct Answer: D