Period of a floating block pushed down and released

1. A.
   $2\pi\sqrt{\frac{abc}{g}}$
2. B.
   $\frac{bcd}{g}$
3. C.
   $2\pi\sqrt{\frac{g}{da}}$
4. D.
   $2\pi\sqrt{\frac{ad}{g}}$

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1. A.
   $\frac{1}{2\pi}\sqrt{\frac{A\rho g}{m}}$
2. B.
   $2\pi\sqrt{\frac{A\rho g}{m}}$
3. C.
   $\frac{1}{2\pi}\sqrt{\frac{m}{a\rho g}}$
4. D.
   $2\pi\sqrt{\frac{m}{a\rho g}}$

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1. A.
   $2\pi\sqrt{\dfrac{L\rho}{(\rho - d)g}}$
2. B.
   $2\pi\sqrt{\dfrac{Ld}{\rho g}}$
3. C.
   $2\pi\sqrt{\dfrac{L\rho}{dg}}$
4. D.
   $2\pi\sqrt{\dfrac{Ld}{(\rho - d)g}}$

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