A cube of external dimension $10\ cm$ has an inner cubical portion of side $5\ cm$ whose density is twice that of the outer portion. If this cube is just floating in a liquid of density $2\ g/cm^3$, find the density of the inner portion
A$\frac{8}{9}\ gm/cc$
B$\frac{16}{9}\ gm/cc$
C$\frac{32}{9}\ gm/cc$
D$\frac{5}{4}\ gm/cc$
Medium
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C$\frac{32}{9}\ gm/cc$
c $m g=2 \rho_{1} \times 10^{3}+\rho_{1} \times\left(20^{3}-10^{3}\right)$
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