A cuboid ABCDEFGH is anisotropic with \( \alpha_{x}=1 \times 10^{-5} /{ }^{\circ} \mathrm{C}, \a...
A cuboid ABCDEFGH is anisotropic with \( \alpha_{x}=1 \times 10^{-5} /{ }^{\circ} \mathrm{C}, \alpha_{y}=2 \times 10^{-5} /{ }^{\circ} \mathrm{C}, \alpha_{z}=3 \times 10^{-5} /{ }^{\circ} \mathrm{C} \). Coefficient of superficial expansion of faces can be
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(A) \( \beta_{\mathrm{ABCD}}=5 \times 10^{-5} /{ }^{\circ} \mathrm{C} \)
(B) \( \beta_{\mathrm{BCGH}}=4 \times 10^{-5} /{ }^{\circ} \mathrm{C} \)
- (C) \( \beta_{\mathrm{CDEH}}=3 \times 10^{-5} /{ }^{\circ} \mathrm{C} \)
(D) \( \beta_{\mathrm{EFGH}}=2 \times 10^{-5} /{ }^{\circ} \mathrm{C} \)
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