You can't. You need to know content.
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You cannot calculate volume and density with only the mass. If the exact material forming the mass is known, then density can be looked up from a variety of sources and the volume can be calculated as mass divided by density. For example, given only the mass "10 kg" we have no way of knowing the volume or density. However, given "10 kg of gold" we can look up the density (19.3 grams per cubic centimeter) and divide 10,000 by 19.3 to get a volume of 518.13 cc.
If you only know mass, you don't have enough information to calculate density.You also need to know the volume of the piece that has that mass.Once you have both of those numbers, the density is(Mass) divided by (Volume)of the same sample.
It is not possible to calculate the area given only the volume.
You cannot calculate the volume of an object using only the density; you must also calculate the mass.You can calculate the mass by simply weighing the object.Density = Mass / VolumeTherefore Volume = Mass/Density.If you cannot be bothered to calculate the mass, simply measure the object. Multiply the length, times the width, times the height and you have the volume.
You can't. Density = (mass) divided by (volume). That's three numbers. I order to find any one of them, you have to know the other two.