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If the velocity of sound in dry air at 0...

If the velocity of sound in dry air at `0^(@)C` is `332 m s^(-1)`. Find the temperature at which it will be `345 m s^(-1)`, co-efficient of volume expansion of air being `0.00368//^(@)C`.
[Hint: Use `C/C_(0)= sqrt(T/T_(0))`. Now, `T_(0)=1/alpha` where `alpha=` co-effient of expansion]

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The correct Answer is:
`21.7^(@)C`
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