Justify why sound waves need a medium to propagate with example??

Sound needs a material medium for their propagation like solid, liquid or gas to travel because the molecules of solid, liquid and gases carry sound waves from one point to another. Sound cannot progress through the vacuum because the vacuum has no molecules which can vibrate and carry the sound waves.

distance = 150m

displ = root (50 ^2 + 100^2)

root(2500+10000)

root 125000