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A metal rod of 1 m length is drop...

A metal rod of 1 m length is dropped exact vertically on to a hard metal floor . With an oscilloscope . It is determined that the impact produces a longitudinal wave of 1.2 kHz frequency . The speed of sound in the metal rod is

A

`600 m//s`

B

`2400 m//s`

C

`1800 m//s`

D

`1200 m//s`

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