document.write( "Question 328646: area of square is 400. find the cost of boundary wall if the rate of per meter is rs 5. \n" ); document.write( "
Algebra.Com's Answer #235433 by mananth(16946)\"\" \"About 
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area of square =400
\n" ); document.write( "Area = L^2 L = length of side
\n" ); document.write( "L^2=400
\n" ); document.write( "L= sqrt 400
\n" ); document.write( "L=20
\n" ); document.write( "..
\n" ); document.write( "Perimeter of square = 4*L
\n" ); document.write( "=4*20=80\r
\n" ); document.write( "\n" ); document.write( "Rate /meter = Rs.5
\n" ); document.write( "For 80 meters it will be 5*80=Rs400
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