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The stress along the length of a rod wit...

The stress along the length of a rod with rectangular cross section) is `1%` of the Young's modulus of its material. What is the approximate percentage of change of its volume? (Poisson's ratio of the material of the rod is 0.3)

A

`3%`

B

`1%`

C

`0.7%`

D

`0.4%`

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The correct Answer is:
D
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