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

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

10 kHz

7.5 kHz

5 kHz

2.5 kHz

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