document.write( "Question 1107823: Plastic drum of cylindrical shape is made by melting spherical solid plastic balls of radius 1cm .Find the number of balls required to make the drum of thickness 2cm,height 90cm and outer radius 30cm \n" ); document.write( "
Algebra.Com's Answer #722980 by Sanchita(1)\"\" \"About 
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Vol.of cylinder=πr2h
\n" ); document.write( " =(22/7)*(30^2)*90
\n" ); document.write( " =254571.43\r
\n" ); document.write( "\n" ); document.write( "Vol.of inner cylinder=πr2h
\n" ); document.write( " =(22/7)*(28^7)*88
\n" ); document.write( " =216832\r
\n" ); document.write( "\n" ); document.write( "Vol.of cylinder=vol.of outer cylinder-vol.of inner cylinder
\n" ); document.write( " =254571.43-216832
\n" ); document.write( " =37739.43 cm^3\r
\n" ); document.write( "\n" ); document.write( "Vol.of 1 ball=(4/3)*(22/7)*1^3
\n" ); document.write( " 4.1905\r
\n" ); document.write( "\n" ); document.write( "No.of ball required =37739.43/4.1905
\n" ); document.write( " =9006 balls
\n" ); document.write( "
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