Question

When equal volumes of two metals are mixed togethers, the specific gravity of alloy is 4. When equal masses of the same two metals are mixed together, the specific gravity of the alloy is 3.Calculate the specific gravity of each metal.

Answer 1

In case of two metals

So, when equal volumes are mixed, V₁ = V₂ = V and m₁ = Vρ₁ and m₂ = Vρ₂ , then 

When equal masses are mixed, m₁ = m₂ = m and V₁ = (m/ρ₁ ) and V₂ = (m/ρ₂ ), then

Solving Eqs. (1) and (2) for ρ₁ and ρ₂ , we find specific gravities of metals are 2 and 6.