wikiHow Converting Millimeters to Grams Practice Problems As millimeters (mm) and grams (g) measure different physical quantities, it is not possible to directly convert millimeters to grams. However, if you know the density of the material in question in grams per cubic millimeter (g/mm³) and the volume of the material in cubic millimeters (mm³), you can use the following formula to convert millimeters to grams: mass (g) = volume (mm³) x density (g/mm³) Here are 20 practice problems for converting millimeters to grams using this formula: 1. A rectangular prism of iron measures 10 mm x 15 mm x 20 mm. If the density of iron is 7.87 g/mm³, what is the mass of the iron? 2. A cylindrical rod of copper measures 8 mm in diameter and 100 mm in length. If the density of copper is 8.96 g/mm³, what is the mass of the copper rod? 3. A sphere of lead has a diameter of 30 mm. If the density of lead is 11.34 g/mm³, what is the mass of the lead sphere? 4. A rectangular block of aluminum measures 5 mm x 10 mm x 15 mm. If the density of aluminum is 2.7 g/mm³, what is the mass of the aluminum block? 5. A cuboid of gold measures 20 mm x 25 mm x 30 mm. If the density of gold is 19.32 g/mm³, what is the mass of the gold cuboid? 6. A cylindrical tube of brass has an outer diameter of 12 mm, an inner diameter of 10 mm, and a length of 50 mm. If the density of brass is 8.4 g/mm³, what is the mass of the brass tube? 7. A cone of ice cream has a height of 80 mm and a diameter of 40 mm at the top. If the density of ice cream is 1.1 g/mm³, what is the mass of the ice cream cone? 8. A square pyramid of granite has a base side length of 40 mm and a height of 30 mm. If the density of granite is 2.75 g/mm³, what is the mass of the granite pyramid? 9. A rectangular prism of silver measures 15 mm x 20 mm x 25 mm. If the density of silver is 10.49 g/mm³, what is the mass of the silver prism? 10. A cylinder of brass has a height of 100 mm and a diameter of 50 mm. If the density of brass is 8.4 g/mm³, what is the mass of the brass cylinder? 11. A sphere of mercury has a diameter of 50 mm. If the density of mercury is 13.55 g/mm³, what is the mass of the mercury sphere? 12. A cuboid of platinum measures 15 mm x 20 mm x 25 mm. If the density of platinum is 21.45 g/mm³, what is the mass of the platinum cuboid? 13. A cylinder of aluminum has a height of 80 mm and a diameter of 60 mm. If the density of aluminum is 2.7 g/mm³, what is the mass of the aluminum cylinder? 14. A cuboid of copper measures 10 mm x 15 mm x 20 mm. If the density of copper is 8.96 g/mm³, what is the mass of the copper cuboid? 15. A cone of sand has a height of 100 mm and a base radius of 30 mm. If the density of sand is 1.6 g/mm³, what is the mass of the sand cone? 16. A cuboid of lead measures 12 mm x 18 mm x 24 mm. If the density of lead is 11.34 g/mm³, what is the mass of the lead cuboid? 17. A cylinder of steel has a height of 50 mm and a diameter of 40 mm. If the density of steel is 7.85 g/mm³, what is the mass of the steel cylinder? 18. A rectangular block of tungsten measures 5 mm x 10 mm x 15 mm. If the density of tungsten is 19.25 g/mm³, what is the mass of the tungsten block? 19. A cuboid of aluminum measures 10 mm x 15 mm x 20 mm. If the density of aluminum is 2.7 g/mm³, what is the mass of the aluminum cuboid? 20. A cylindrical rod of copper measures 15 mm in diameter and 50 mm in length. If the density of copper is 8.96 g/mm³, what is the mass of the copper rod? Page