JEE Advanced 2020 Paper 2

A cubical solid aluminium (bulk modulus =− V

dP

dV

=70GPa ) block has an edge length of 1 m on the surface of the earth. It is kept on the floor of a 5 km deep ocean. Taking the averagedensity of water and the acceleration due to gravity to be 103 kg m−3 and 10 ms−2, respectively, the change in the edge length of the block in mm is _____.