document.write( "Question 849818: two solid cylinder of radii 4 cm and 5 cm and length 6 cm and 4 cm respectively are recast in to cylindrical disk of thickness 1 cm. the radius of the disk ? \n" ); document.write( "
Algebra.Com's Answer #511791 by Fombitz(32388)\"\" \"About 
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The volume of a cylinder is \"V=pi%2AR%5E2%2AL\"
\n" ); document.write( "\"V%5B3%5D=V%5B1%5D%2BV%5B2%5D\"
\n" ); document.write( "\"pi%2AR%5E2%2A1=pi%2A4%5E2%2A6%2Bpi%2A5%5E2%2A4\"
\n" ); document.write( "\"R%5E2=96%2B100\"
\n" ); document.write( "\"R%5E2=196\"
\n" ); document.write( "\"R=14\"cm
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