Two closed pipe produce 10 beats per second when emitting their fundamental nodes. If their length are in ratio of 25 : 26. Then their fundamental frequency in Hz, are

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270, 280

260, 270

260, 250

260, 280

answer is C.

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Detailed Solution

n1−n2=10 ..…(i) Using n1=v4l1 and n2=v4l2⇒n1n2=l2l1=2625 …..(ii)After solving these equation n1=260 Hz, n2=250 Hz

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