Change in volume for rectangular bar/Volumetric strain/ strength of materials

Change in volume for rectangular bar/Volumetric strain/ strength of materials
A rectangular bar 500 mm long and 100 mm × 50 mm in cross-section is subjected to forces as shown in Fig. What is the change in the volume of the bar? Take modulus of elasticity for the bar material as 200 GPa and Poisson’s ratio as 0.25. / Change in volume/Volumetric strain/ strength of materials