Question

# The mass of a body whose volume is 2m3 and relative density is 0.52 is X kg. Find the value of X.

A
0
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B
1040
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C
2080
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D
3000
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Solution

## The correct option is B 1040Relative density of a substance is the ratio of its density to the density of a reference substance. In this case, the reference substance is water.That is, Relative density=DensityoftheobjectDensityofwater.It is known that the density of water is 1000kg/m3 and the relative density is given as 0.52.Substituting these values in the above formula, we get the density of the substance.That is, Density of the substance = 0.52×1000kg/m3=520kg/m3.The mass of a body is calculated from the formula, Mass=Density×Volume. The volume of the substance is given as 2m3.Therefore, Massofthesubstance=520kg/m3×2m3=1040kg. thereforeX=1040kg

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