A granite rod of 60 cm length is cl...

A granite rod of 60 cm length is clamped a its middle point and is set into logitudinal vibrations . The density of granite is `2.7 xx10 ^3 Kg // m^(3) ` and its Young's modulus is `9.27 xx10 ^(10) ` Pa. What will be fundamental frequency of the logitudinal vibrations ?

10 kHz

`7.5 kHz`

`5 kHz`

`2.5 kHz`

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