Problem

Problem

A longitudinal sound wave given by p=2.5sin⁡[π2(x−600t)]p = 2.5 \sin\left[\frac{\pi}{2}(x - 600 t)\right] (pp is in N/m2\text{N}/\text{m}^2, xx is in metre and tt is in second) is sent down a closed organ pipe. If the pipe vibrates in its second overtone, the length of the pipe is a. 6 m b. 8 m c. 5 m d. 10 m

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