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 $1.2 \;k Hz$ frequency. The speed of sound in the metal rod is
NEET 2017, Medium
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$v=\lambda f$
$v=f_{\min } \lambda_{\max }$
$v=f_{\min } \times 2 L$
$v=1.2 \times 10^{3} \times 2 \times 1$
$v=2400 m / s$
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