Each side of a cube is decreased by 2% when a pressure of $3\times 10^6N/m^2$ is applied.What is bulk modulus of cube.

Question

$\begin{array}{1 1}(A)\;2\times 10^6\\(B)\;5\times 10^7\\(C)\;3\times 10^7\\(D)\;6\times 10^6\end{array} $