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Solving Linear Equations Using Transpose of Terms

Equal masses ...

Question

Equal masses of two substances of densities $ρ_{A}$ and $ρ_{B}$ are mixed together. The density of the mixture would be

A

\sqrt{ρ_{A} ρ_{B}}

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B

\frac{ρ_{A} + ρ_{B}}{2}

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C

\frac{ρ_{A} ρ_{B}}{ρ_{A} + ρ_{B}}

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D

\frac{2 ρ_{A} ρ_{B}}{ρ_{A} + ρ_{B}}

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Solution

The correct option is D $\frac{2 ρ_{A} ρ_{B}}{ρ_{A} + ρ_{B}}$

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