Two open organ pipes of fundamental frequencies \( \mathrm{n}_{1} \) and \( \mathrm{n}_{2} \) ar...

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Two open organ pipes of fundamental frequencies \( \mathrm{n}_{1} \) and \( \mathrm{n}_{2} \) are joined in series. The fundamental
\( \mathrm{P} \) frequency of the new pipe so obtained will be :

W
(1) \( \mathrm{n}_{1}+\mathrm{n}_{2} \)
(2) \( \mathrm{n}_{1} \mathrm{n}_{2} /\left(\mathrm{n}_{1}+\mathrm{n}_{2}\right) \)
(3) \( \sqrt{\mathrm{n}_{1} \mathrm{n}_{2}} \)
(4) \( \sqrt{\left(n_{1}^{2}+n_{2}^{2}\right)} \)
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