Q: When equal volumes of two metals are mixed together, the specific gravity of alloy is 4. When masses of the same two metals are mixed together, the specific gravity of the alloy now becomes 3. Find specific gravity of each metal ?
$specific \; gravity = \frac{density\; of\; substance}{density \; of \;water} $
Sol: In case of mixture, $\large \rho_{mix} = \frac{m_1 + m_2}{V_1 + V_2} $
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