For a certain organ pipe three successive resonance frequencies are observed at \( 425 \mathrm{~...

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For a certain organ pipe three successive resonance frequencies are observed at \( 425 \mathrm{~Hz}, 595 \)
P \( \mathrm{Hz} \) and \( 765 \mathrm{~Hz} \) respectively. If the speed of sound

W. in air is \( 340 \mathrm{~m} / \mathrm{s} \), then the length of the pipe is:
(1) \( 2.0 \mathrm{~m} \)
(2) \( 0.4 \mathrm{~m} \)
(3) \( 1.0 \mathrm{~m} \)
(4) \( 0.2 \mathrm{~m} \)
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