**Question**

**The density of water is 1000 kg/m ^{3}. If the relative density of iron is 7.874 calculate the density of iron [Ans. 7874 kg/m^{3}] **

**Answer**

Density of water = 1000 kg/m^{3}

Relative density (RD) = 7.874

Density of iron = Density of water × (RD)

= 1000 × 7.874 = 7874 kg/m^{3}