document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=410977>Question 410977</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please find the area of a rectangle whose length is 21 cm and whose perimeter is 90 cm. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #288891 by </B><A HREF=/tutors/aboutme.mpl?userid=dudeantariksh><B>dudeantariksh(10)</B></A><img src=\"/images/stars/stars-05.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dudeantariksh><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=288891\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> hiee there..<BR>\n" );
document.write( "firstly..<BR>\n" );
document.write( "we know that in a rectangle , the opposite sides are equal......................<BR>\n" );
document.write( "we also know that area of a rectangle is (length) x (breadth)<BR>\n" );
document.write( "so if we find the breadth then we can easily compute the area.<BR>\n" );
document.write( "................................................................................<BR>\n" );
document.write( "perimeter of any figure is the sum of the lenghts of all sides..<BR>\n" );
document.write( "therefore,<BR>\n" );
document.write( "perimeter of a rectangle = lenghth + length +breadth + breadth<BR>\n" );
document.write( "                         = 2(length + breadth)<BR>\n" );
document.write( "                         = 2( 21 + breadth)         <BR>\n" );
document.write( "................................................................................ <BR>\n" );
document.write( "but perimeter of the rectangle is 90  cm<BR>\n" );
document.write( "      therefore,<BR>\n" );
document.write( "                   90    = 2(21+breadth)<BR>\n" );
document.write( "      therefore, if we divide by 2 throughout, we get,<BR>\n" );
document.write( "                90/2     = 2/2( 21+ breadth)<BR>\n" );
document.write( "      therefore, <BR>\n" );
document.write( "                    45   = 21 + breadth<BR>\n" );
document.write( "therefore,      breadth  = 45-21              (subtracting 21 from both sides)<BR>\n" );
document.write( "                breadth  =  24 cm.<BR>\n" );
document.write( "...................................................................<BR>\n" );
document.write( "area of the rectangle    = length x breadth<BR>\n" );
document.write( "                         = 21 x 24<BR>\n" );
document.write( "                         = 504 sq. cm.\r<BR>\n" );
document.write( "\n" );
document.write( "ans.. the area of the rectangle is 504 sq.cm. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );