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A wooden cube (density of wood $'d'$ ) of side $'l'$ floats in a liquid of density $'\rho '$ with its upper and lower surfaces horizontal. If the cube is pushed slightly down and released, it performs simple harmonic motion of period $'T'$. Then, $'T'$ is equal to
  • A$2\pi \sqrt {\frac{{l\rho }}{{\left( {\rho  - d} \right)g}}} $
  • B$2\pi \sqrt {\frac{{ld }}{{\rho g}}} $
  • C$2\pi \sqrt {\frac{{l\rho }}{{dg}}} $
  • D$2\pi \sqrt {\frac{{ld}}{{\left( {\rho  - d} \right)g}}} $
AIEEE 2011, Diffcult
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