Question

in which medium is speed of sound fastest and why

Answer 1

Sound travels fastest in solids because molecules of solids are tightly packed as compared to liquid and gases.

Answer 2

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Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air.