A uniform cube is subjected to volume compression. If each side is decreased by 1%, then bulk strain is

If side of the cube is L then V = ${\mathrm{L}}^3$  $\Rightarrow \frac{\mathrm{dV}}{\mathrm{V}} = 3\frac{\mathrm{dL}}{\mathrm{L}}$

% change in volume = 3 $\times$(% change in length)

        = 3$\times$1% = 3%    Bulk strain $\frac{∆\mathrm{V}}{\mathrm{V}} = 0.03$