document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=803376>Question 803376</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A cylindrical roller is of length 2m and diameter 84cm.find the number of revolutions it has to make to cover an area of 7920meter squared. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #484308 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=484308\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A cylindrical roller is of length 2m and diameter 84cm.find the number of revolutions it has to make to cover an area of 7920meter squared.\r<BR>\n" );
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document.write( "length of roller = 2m<BR>\n" );
document.write( "radius of roller = 84/2 = 42 cm = 0.42 m\r<BR>\n" );
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document.write( "surface are of roller = 2pirl<BR>\n" );
document.write( "=2*pi*0.42*2<BR>\n" );
document.write( "=5.28 m^2\r<BR>\n" );
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document.write( "Number of revolutions = 7920/5.28\r<BR>\n" );
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document.write( "= 1500 revolutions\r<BR>\n" );
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