document.write( "Question 1110396: A rectangular land of 90 hectares.
\n" ); document.write( "If the width if 2/5 of the length.
\n" ); document.write( "What is the perimeter? \n" ); document.write( "

Algebra.Com's Answer #725381 by Cromlix(4381) $\"\"$ $\"About$

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Hi there,
\n" ); document.write( "Make length = x
\n" ); document.write( "the width is therefore 2/5x
\n" ); document.write( "Area = length x width
\n" ); document.write( "90 = x(2/5x)
\n" ); document.write( "Reverse equation
\n" ); document.write( "2/5x^2 = 90
\n" ); document.write( "2x^2 = 90 * 5 [* means times]
\n" ); document.write( "2x^2 = 450
\n" ); document.write( "x^2 = 450/2
\n" ); document.write( "x^2 = 225
\n" ); document.write( "x = 15
\n" ); document.write( "Length = 15 hectares
\n" ); document.write( "Width = 6 hectares
\n" ); document.write( "Perimeter = 2 * length + 2 * width
\n" ); document.write( "Perimeter = 2 * 15 + 2 * 6
\n" ); document.write( "Perimeter = 42
\n" ); document.write( "If you want your measurements in metres
\n" ); document.write( "90 hectares = 900,000 m^2
\n" ); document.write( "Area = length x width
\n" ); document.write( "900000 = x(2/5x)
\n" ); document.write( "Reverse equation
\n" ); document.write( "2/5x^2 = 900000
\n" ); document.write( "2x^2 = 900000 * 5 [* means times]
\n" ); document.write( "2x^2 = 4500,000
\n" ); document.write( "x^2 = 4500000/2
\n" ); document.write( "x^2 = 2250000
\n" ); document.write( "x = 1500
\n" ); document.write( "Length = 1500 hectares
\n" ); document.write( "Width = 600 hectares
\n" ); document.write( "Perimeter = 2 * length + 2 * width
\n" ); document.write( "Perimeter = 2 * 1500 + 2 * 600
\n" ); document.write( "Perimeter = 4200 metres \r
\n" ); document.write( "\n" ); document.write( "Hope this helps :-) \n" ); document.write( "

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