Ratio of lengths of a closed pipe and an open pipe that are in unison at given overtones

1. A.
   $\frac{4L_1}{3}$
2. B.
   $\frac{4L_1}{3}\sqrt{\frac{\rho_1}{\rho_2}}$
3. C.
   $\frac{4L_1}{3}\sqrt{\frac{\rho_2}{\rho_1}}$
4. D.
   $\frac{3}{4}L_1\sqrt{\frac{\rho_1}{\rho_2}}$

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1. A.
   $\frac{L}{2}$
2. B.
   $L$
3. C.
   $2L$
4. D.
   $4L$

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1. A.
   $11 : 6$
2. B.
   $11 : 12$
3. C.
   $6 : 11$
4. D.
   $12 : 11$

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1. A.
   $8 : 7$
2. B.
   $7 : 8$
3. C.
   $5 : 3$
4. D.
   $3 : 2$

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1. A.
   $13 : 14$
2. B.
   $14 : 13$
3. C.
   $11 : 12$
4. D.
   $12 : 11$

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1. A.
   $\dfrac{6}{5}$
2. B.
   $\dfrac{7}{9}$
3. C.
   $\dfrac{4}{3}$
4. D.
   $\dfrac{7}{8}$

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1. A.
   $3 : 8$
2. B.
   $3 : 4$
3. C.
   $3 : 2$
4. D.
   $3 : 1$

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