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For a certain organ pipe, three successi...

For a certain organ pipe, three successive resonance frequencies are observed at 425, 595 and 765 Hz. The speed of sound in air is 340 m/s. The pipe is

A

Closed pipe of length 1 m

B

Closed pipe of length 2 m

C

Open pipe of length 1 m

D

Open pipe of length 2 m

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