Volume = 45 cubic meters

Density = 1900 kg/cubic meters

Mass = (45)(1900) = 85500

is the unit in kilograms?

because in this site> DENSITY

it says tons. i'm confused.

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- May 14th 2011, 07:21 AMDugMass, Density, And Volume (what units?)
Volume = 45 cubic meters

Density = 1900 kg/cubic meters

Mass = (45)(1900) = 85500

is the unit in kilograms?

because in this site> DENSITY

it says tons. i'm confused. - May 14th 2011, 07:27 AMTheEmptySet
We know that mass is equal to density times volume

In symbols we have

$\displaystyle m=\rho V$

So density must be

$\displaystyle \rho =\frac{m}{V}$

Density can have any units of mass divided by volume. In the SI system it is common to have Kilograms per cubic meter, but others are often used as well. - May 14th 2011, 07:37 AMDug
Thanks. But in that specific problem, is 85500 in kilogram units? because that's just the first part.

The whole problem is this:

*A building organization has to transport a conical heap of sand. How many 3-ton dumpers are required to transport the sand if the measurements gave the following results: the length of the circumference of the base circle is equal to 35.2m, the generator to 9.5m? each dumper has to carry five trips.. the density of sand equals 1.9x10^3 kg/m^3* - May 14th 2011, 07:55 AMTheEmptySet
First a metric tonne is gives by

$\displaystyle 10^3 kg=1 \text{ metric tonne }$

Tonne - Wikipedia, the free encyclopedia

You can find the radius of the circle using the formula

$\displaystyle C=2\pi r$

Quote:

the length of the circumference of the base circle is equal to 35.2m, the generator to 9.5m?