46ᵗʰ B.P.S.C. (Pre) 2004
Brass is formed by mixing one volume part of zinc (density 7100 kg/m³) with two volume parts of copper (density 8900 kg/m³). The density of brass is -
a8000 kg/m³
b8300 kg/m³✓ Correct
c9500 kg/m³
d9800 kg/m³
Explanation
3 parts of brass = 1 part zinc + 2 parts copper = 7100 + 2 × 8900 = 24900 Density of brass = $$\frac{24900}{3}$$ = 8300 kg/m³
general-science