document.write( "Question 152758: The inside radius of a spherical metal shell is 50cm and the thickness of the shell is 0.4cm. Calculate the volume of the material used in the shell to the nearest unit.\r
\n" ); document.write( "\n" ); document.write( "The formula for volume of a sphere is 4/3 pi r^3 so is the answer 4/3 pi 50^3 = 523333.33 or do I have to do something with the 0.4cm thickness?\r
\n" ); document.write( "\n" ); document.write( "Thanks
\n" ); document.write( "

Algebra.Com's Answer #112281 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
You need to find the volume of the outer sphere (\"V%5B2%5D\")and subtract the volume of the inner sphere (\"V%5B1%5D\"):
\n" ); document.write( "\"V%5B2%5D+=+%284%2F3%29%2Api%2AR%5B2%5D%5E3\" - \"V%5B1%5D+=+%284%2F3%29%2Api%2AR%5B1%5D%5E3\"
\n" ); document.write( "\"V%5B2%5D+=+%284%2F3%29%2Api%2A%2850.4%29%5E3\" - \"V%5B1%5D+=+%284%2F3%29%2Api%2850%29%5E3\"
\n" ); document.write( "\"V%5B2%5D+=+4.2%28128024.064%29\" - \"V%5B1%5D+=+4.2%28125000%29\" = \"4.2%283024.064%29+=+highlight%2812701%29\" cu.cm Approximately.
\n" ); document.write( "
\n" );