The relationship between Young's modulus \( Y \), Bulk modulus \( \mathrm{K} \) and modulus of r...

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The relationship between Young's modulus \( Y \), Bulk modulus \( \mathrm{K} \) and modulus of rigidity \( \eta \) is [MP PET 1991; MP PMT 1997]
(a) \( Y=\frac{9 \eta K}{\eta+3 K} \)
(b) \( \frac{9 Y K}{Y+3 K} \)
(c) \( Y=\frac{9 \eta K}{3+K} \)
(d) \( Y=\frac{3 \eta K}{9 \eta+K} \)
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