If the poissons ratio of a solid is \( 2 / 5 \), then the ratio of its youngs modulus to the rig...

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If the poissons ratio of a solid is \( 2 / 5 \), then the ratio of its youngs modulus to the rigidity modulus is
(a) \( 5 / 4 \)
(b) \( 7 / 15 \)
(c) \( 14 / 9 \)
(d) \( 14 / 5 \)
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