The length of a metal rod at $30^{\circ} C$ is $30 \ cm$. If its temperature is raised to $105^{\circ} C$,its length is increased by $0.027 \ cm$. Then the coefficient of linear expansion of the metal is
- A$12 \times 10^{-4} /{ }^{\circ} C$
- B$12 \times 10^{-5} /{ }^{\circ} C$
- C$12 \times 10^{-6} /{ }^{\circ} C$
- D$12 \times 10^{-7} /{ }^{\circ} C$
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MediumAIIMS 2019
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