SOLUTION: the diameter of an iron ball used in putting the short is 12cm. the density of iron is 7.8g/cm^3. calculate the mass of the ball in kg to 3 significant figure.

Question 1126290: the diameter of an iron ball used in putting the short is 12cm. the density of iron is 7.8g/cm^3. calculate the mass of the ball in kg to 3 significant figure.
Found 3 solutions by addingup, MathLover1, josmiceli:
Answer by addingup(3677)   (Show Source): You can put this solution on YOUR website!
Calculate the volume:
V = 4/3 x Pi x r^3 = 7238.23
Calculate the mass:
mass = volume x density
7238.23*7.8 = 56,458.194
Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!

given:
->

in kg:

Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
For a sphere:

cm
cm
------------------------
In terms of units:
[ g/cm3 ]x[ cm3 ]x[ kg/g ] = [ kg ]

cm3

7.057 kg

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