For a solid rod, the Young's modulus of elasticity is $3.2 \times 10^{11} \mathrm{Nm}^{-2}$ and density is $8 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}$. The velocity of longitudinal wave in the rod will be.
$3.65 \times 10^3 \mathrm{~ms}^{-1}$
$6.32 \times 10^3 \mathrm{~ms}^{-1}$
$18.96 \times 10^3 \mathrm{~ms}^{-1}$
$145.75 \times 10^3 \mathrm{~ms}^{-1}$
Solution
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