Question

Two spheres of same size are made from copper and iron find the ratio between their masses of density of copper 8900 and iron 7800

Answer 1

Two spheres of same size are made from copper and iron.

means, volume of copper sphere = volume of iron sphere = V(let)

given, density of copper sphere = 8900

and density of iron sphere = 7800

we know as well,

mass = density × volume

so, mass of copper sphere = 8900V

similarly, mass of iron sphere = 7800V

now, ratio of their masses = 8900V/7800V

= 89/78

hence, ratio between their masses is 89 : 78.

Answer 2

Answer:

1.14: 1

Explanation

Given : Density Copper Dc = 8900 kg/m3

Density of Iron D1 = 7800 kg/m3

the Volume of Copper sphere = Volume of Iron sphere

To find : Ratio of Masses of Copper (MC) and Iron (MI)

Solution: Mass = Density x Volume

MC = DC x V, M1 = D1 x V

MC = 8900 V, M1 = 7,800 V

MC = M1

8900 V : 7800 V

= 1.14: 1