HOW TO CALCULATE MASS OF CONCRETE TO PREPARE ONE CUBE OF 15 CM^3

The cubes are casted to perform different test on concrete.This is widely used in civil engineering & every civil engineer perform different test with concrete cube so the point is that if we have to prepare exact concrete so that we can prepare one cube then how should we do this so here we will know to calculate the exact mass of concrete for preparing one cube of (15 cm × 15 cm × 15 cm ) volume.Usually this calculation is done at the time of study of civil engineering in field it is not so important because the sample is taken from a big amount of prepared concrete as much is requires to cast the desired cube there is no need to calculate the exact volume or mass but this thing will be helpful for calculating quantity of concrete required for big works. so let us start

the first things we have to know is that the density of plane concrete i.e 2400 kg/m^3

now we have to calculate the volume of one cube in cubic meter
=15 cm × 15 cm × 15 cm  =3.375 cm^3 = 3.375 × 10^-6 = 0.00337 m^3
now after converting volume into meter cube we have to apply the formula of density
        DENSITY= MASS/VOLUME
from here
        MASS=DENSITY × VOLUME
as we have to calculate the mass of one cube so we found out the formula of mass now,
        MASS=2400 kg/m^3 × 0.00337 m^3
        MASS= 8.1 kg
In this way we can calculate the mass of one cube