Question

find mass of a substance containing in a volume20 m³ whose relative density(RD) is0.2​

Answer 1

Answer:

4000 kg

Explanation:

RD = Dobj / Dwater

=> 0.2 = (m/20)/1000

=> 0.2 = m/20000

=> m = 4000

Hence, Mass the of the object is 4000 kg

Answer 2

Answer:

Mass of substance is 4000kg.

Explanation:

The 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=  

                                Density of object / Density of the water at 4 degree

         Therefore, Density of substance = 0.2 * 1000 = 200kg/m^3

Now,

           Density = Mass/volume

           200  =  mass/20

Hence,

     mass= 200*20

                =4000kg.

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