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The air column in a closed-end organ pipe is vibrating in the second overtone. The frequency of vibration is $$440\ Hz$$.
The speed of sound in ait is $$330\ m/s$$. The length of air column is

A
$$\dfrac{15}{16}M$$
B
$$\dfrac{3}{4}m$$
C
$$\dfrac{16}{15}m$$
D
$$none\ of\ these$$
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Solution
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Correct option is A. $$\dfrac{15}{16}M$$

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