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Q. Equal masses of water and a liquid of density $2 \, g / c c$ are mixed together, then the mixture has a density of

NTA AbhyasNTA Abhyas 2022

Solution:

If two liquids of equal masses and different densities are mixed together then the density of the mixture is
$\rho =\frac{2 \rho _{1} \rho _{2}}{\rho _{1} + \rho _{2}}$
$\rho =\frac{2 \times 1 \times 2}{1 + 2}=\frac{4}{3}$
$\rho =\frac{4}{3}​​ \, g/cc$