Question

Two spheres of same size are made from copper and iron respectively. Find the ratio between their masses (Density of copper is 8,900 kg/m and iron is 7,800 kg/m³ ).

Answer 1

Given : Density Copper Dc = 8900 kg/m³
Density of Iron D₁ = 7800 kg/m³
Volume of Copper sphere = Volume of Iron sphere
To find : Ratio of Masses of Copper (M_C) and Iron (M_I)
Solution: Mass = Density x Volume
M_C = D_C x V, M₁ = D₁ x V
M_C = 8900 V, M₁ = 7,800 V
M_C = M₁
8900 V : 7800 V
= 1.14: 1