document.write( "Question 796224: a metal pipe has thickness 3 cm and outer radius 10 cm. find the volume of metal required to cast the pipe. if the length of pipe is 5 meter \n" ); document.write( "
Algebra.Com's Answer #481323 by Cromlix(4381)\"\" \"About 
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External volume = Pi*r^2*h
\n" ); document.write( "External volume = Pi*10^2*500
\n" ); document.write( "External volume = 157079.63 cm^3
\n" ); document.write( "Inner volume = Pi*r^2*h
\n" ); document.write( "Inner volume = Pi*7^2*500
\n" ); document.write( "Inner volume = 76969.02 cm^3
\n" ); document.write( "External volume - Inner volume
\n" ); document.write( "157079.63 - 76969.02
\n" ); document.write( "= 80110.61 cm^3
\n" ); document.write( "Hope this helps.
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