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A true balance measures mass, so grams or kilograms.
It is called the Metric System of Units, and is now used by almost the entire world, for the last 40 or more years because it is so simple to use and calculate. The only country of significance, which does not use the Metric System, is USA.
A 20 dollar bill is 6.14 inches long and 2.61 inches wide, so using the formula to find area of a rectangle (A=LW), we have 6.14*2.61= 16.0254 inches.In metric units, a 20 dollar bill is 15.6 cm long and 6.63 inches wide, so the area of a dollar bill in metric units is 103.39 cm, or 1,033.89 mm.
One kg = 1000 grams. So one gram is 10^-3 kilograms. Kilograms and grams are both the metric units of mass. So the answer is 2.307 KG
One kg = 1000 grams. So one gram is 10^-3 kilograms. Kilograms and grams are both the metric units of mass. So the answer is 100 KG