Density and youngs modulus of a certain hypothetical material are $\;5 \;gm/cm^{3}\;$ and $\;2\times10^{10} pa\;$ velocity of sound in this material is

Question

$(a)\;4 \times10^{3}\;m/s\qquad(b)\;10^{3}\;m/s\qquad(c)\;8 \times10^{3}\;m/s\qquad(d)\;None\;of\;these$