document.write( "Question 1053631: Earth has a thin outer layer called the crust, which averages about 24 km thick. Earth's diameter is about 12,750 km. What percentage of the volume of Earth is the crust? \n" ); document.write( "
Algebra.Com's Answer #668827 by Alan3354(69443)\"\" \"About 
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Earth has a thin outer layer called the crust, which averages about 24 km thick. Earth's diameter is about 12,750 km. What percentage of the volume of Earth is the crust?
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\n" ); document.write( "Find the volume of the Earth.
\n" ); document.write( "\"Vol+=+4pi%2Ar%5E3%2F3\" r = 6375
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\n" ); document.write( "Find the volume of the Earth without the crust.
\n" ); document.write( "\"Vol+=+4pi%2Ar%5E3%2F3\" r = 6375 - 24
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\n" ); document.write( "Volume of the crust is the difference of the 2 volumes.
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\n" ); document.write( "Divide the crust volume by the Earth's volume.
\n" ); document.write( "Multiply by 100 to get %
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