A metal of length $30\mathrm{cm}$ is heated until its temperature rises by ${60}^{\circ }\mathrm{C}$ to a new length of $30.04\mathrm{cm}$. Calculate its linear expansively

A. $4.44\times {10}^{-5}{\mathrm{K}}^{-4}$
B. $2.22\times {10}^{-5}{\mathrm{K}}^{-1}$  
C. $3.33\times {10}^{-5}{\mathrm{K}}^{-4}$
D. $1.53\times {10}^{-5}{\mathrm{K}}^{-4}$

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Correct Answer: B