Question

calculate the mass of a body whose volume is 3 metre cube and relative density is 0.628.​

Answer 1

Answer:

Relative 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=

Densityofwater

Densityoftheobject

.

It is known that the density of water is 1000kg/m

3

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/m

3

=520kg/m

3

.

The mass of a body is calculated from the formula, Mass=Density×Volume. The volume of the substance is given as 2m

3

.

Therefore, Massofthesubstance=520kg/m

3

×2m

3

=1040kg.

thereforeX=1040kg

Answer 2

Answer:

She is correct, that's right answer