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The work done per unit volume to stretch...

The work done per unit volume to stretch the length of area of cross-section `2 mm^2` by 2% will be `[Y= 8xx10^10N//m^2]`

A

`40 MJ//m^3`

B

`16MJ//m^3`

C

`64MJ//m^3`

D

`32MJ//m^3`

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