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In which of the three media : air, water...

In which of the three media : air, water or iron , does sound travel the fastest at a particular temperature ?

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The speed of sound in air `=346"m s"^(-1)`.
The speed of sound in water`=1531"m s"^(-1)`.
The speed of sound in iron `= 5960"m s"^(-1)`.
`therefore` The speed of sound in iron is maximum and sound travels fastest in it.
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