The rate at which sound travels through stone depends on the stone. Sound will travel faster through warm stone than cold stone.
Sound cannot travel through a vacuum.
Oxygen
3400mph
Solids
3400mph
3,348 mph.
900 years
it travels at 250-275mph
You'd have to say that the speed of sound waves in vacuum is zero, becausesound can't travel through vacuum at all. Not even an inch. Sound needs amaterial substance to travel through.
5000 meters per second
100m/s
6420 Meters a second on average.