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Question

What is heavier on the surface of the earth: 1 m3 of cotton or 1 m3 of iron?
(Given: ρiron>ρcotton, where ρ denotes density)
  1. Cotton
  2. Iron
  3. Both will have equal weights
  4. Both will have equal masses


Solution

The correct option is B Iron
From definition of density,
Density=MassVolume
Mass=Density×Volume

It is given that volume of iron and cotton is the same (1 m3). Also, density of iron is much more than cotton. Hence, mass of iron will be more than the density of cotton.

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