document.write( "Question 170130: A garden is in the shape of a rectangle, 20 metres by 8 metres. Around the outside is a border of uniform width and in the middle is a square pond. The width of the border is the same as the width of the pond. The size of the area, which is not occupied by either border or pond, is 124m^2. Find the width of the border. \n" ); document.write( "
Algebra.Com's Answer #125637 by ankor@dixie-net.com(22740)\"\" \"About 
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A garden is in the shape of a rectangle, 20 meters by 8 meters. Around the
\n" ); document.write( " outside is a border of uniform width and in the middle is a square pond.
\n" ); document.write( " The width of the border is the same as the width of the pond. The size of the
\n" ); document.write( " area, which is not occupied by either border or pond, is 124m^2.
\n" ); document.write( " Find the width of the border.
\n" ); document.write( ":
\n" ); document.write( "Let x = the width of the border and also the width of the pond
\n" ); document.write( "Then
\n" ); document.write( "x^2 = area of the pond
\n" ); document.write( "and
\n" ); document.write( "(20*8) - x^2 = (160-x^2) = area of the garden (minus the pond)
\n" ); document.write( "therefore:
\n" ); document.write( "160 - x^2 = 124
\n" ); document.write( "-x^2 = 124 - 160
\n" ); document.write( "-x^2 = -36
\n" ); document.write( "x^2 = 36
\n" ); document.write( "x = \"sqrt%2836%29\"
\n" ); document.write( "x = 6 meters is the width of the border
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check solution
\n" ); document.write( "20 by 8 area - pond area =
\n" ); document.write( "160 - 6^2 =
\n" ); document.write( "160 - 36 = 124\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "
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