# A block of platinum with a mass of 4,290 kilograms has a volume of .2 cubic meters. What is the density of platinum in kilograms per cubic meter?

##### 1 Answer

#### Explanation:

Your goal when dealing with density problems is to figure out the mass of **one unit of volume**.

In this case, volume is given to you in *cubic meters*,

*How do you do that?*

Notice that the problem tells you that a volume of *pack* per unit of volume, you can say that **the same mass** will **always** correspond to the **same volume**.

This means that if

Simply put, the mass of **one cubic meter** will be

#1 color(red)(cancel(color(black)("m"^3))) * "4,290 kg"/(0.2color(red)(cancel(color(black)("m"^3)))) = "21,450 kg"#

Therefore, you can say that platinum has a density of *every*