c
Depth of ocean \(d = 2700\,m\)

Density of water, \(\rho  = {10^3}\,kg\,{m^{ - 3}}\)

Compressibility of water, \(K = 45.4 \times {10^{ - 11}}P{a^{ - 1}}\)

\(\frac{{\Delta V}}{V} = ?\)

Excess pressure at the bottom, \(\Delta P = \rho gd\)

\( = {10^3} \times 10 \times 2700 = 27 \times {10^6}Pa\)

\(We\,know,\,B = \frac{{\Delta P}}{{\left( {\Delta V/V} \right)}}\)

\(\left( {\frac{{\Delta V}}{V}} \right) = \frac{{\Delta P}}{B} = K.\Delta P\)              \(\left( {K = \frac{1}{B}} \right)\)

\( = 45.4 \times {10^{ - 11}} \times 27 \times {10^6} = 1.2 \times {10^{ - 2}}\)