We know sound wave is longitudinal wave and propagation of longitudinal wave depends on bulk modulus(Volume elasticity). But why is 
The speed of sound in a solid the depends on the Young’s modulus of the medium and the density,
  $v = \sqrt{(Y/\text{density of medium})}$
It should also be the same as for liquids and gases
  $v = \sqrt{(B/\text{density of media})}$