The volume change of a solid copper cube 10 cm on an edge, when subjected to a pressure of 7 MPa is (Bulk modulus of copper = 140 GPa)

Here, L = 10 cm = 10$\times {10}^{-2} \mathrm{m}$

         P = 7 MPa = 7 $\times {10}^6 \mathrm{Pa}$

        B = 140 GPa = $140 \times {10}^9 \mathrm{Pa}$

    As   B = $\frac{\mathrm{P}}{{\displaystyle \frac{∆\mathrm{V}}{\mathrm{V}}}}$

$∆\mathrm{V} = \frac{\mathrm{PV}}{\mathrm{B}} = \frac{{\mathrm{PL}}^3}{\mathrm{B}} = \frac{(7 \times {10}^6\mathrm{Pa}){(10\times {10}^{-2}\mathrm{m})}^3}{140\times {10}^9 \mathrm{Pa}}$

         = $5\times {10}^{-8}{\mathrm{m}}^3 = 5 \times {10}^{-2} {\mathrm{cm}}^3$