The standard kilogram is a platinum-iridium cylinder 39 mm in height and 39 mm in diameter. what is the density of the material? density=m/v

mass=1kg and volume being volume of a cylinder.

Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. Therefore, we calculate as follows:

density = mass / volume
density = 1 / πr²h
density = 1 / π((39/2)^2)(39)
density = 1 / 46589.03
density = 2.15 x 10^-5 kg/mm^3

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