Question 994176
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Density of iron=7.874 grams/cm^3
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{{{10000g/(7.874g/cm^3)=1270cm^3}}}
For a disk:(r=radius, h=thickness)
{{{Volume=pi(r^2)(h)}}}
{{{1270cm^3=pi(r^2)(1cm)}}} 
{{{1270cm^2=pi(r^2)}}}
{{{404.25=r^2}}}
{{{20.1=r}}} The radius is 20.1 centimeters.
Diameter=2 x radius=2(20.1cm)=40.2 centimeters.
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ANSWER: The diameter is 40.2 centimeters.
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CHECK:
{{{Volume=pi(r^2)(h)}}}
{{{Volume=pi(20.1cm)^2(1cm)}}}
{{{Volume=pi(404.25cm^3)}}}
{{{Volume=1270cm^3}}}
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Mass=volume x density
{{{10kg=1270cm^3(0.007874kg/cm^3)}}}
{{{10kg=10kg}}}