document.write( "Question 727525: A farmer has 400 feet of fencing. He wants to fence off a rectangular field that borders a straight river (no fence along the river). What are the dimensions that will give him the largest area? Please check to see if I have the right answer. Thanks.\r
\n" ); document.write( "\n" ); document.write( "A=(400-2w)w
\n" ); document.write( "A= -2w^2+400w\r
\n" ); document.write( "\n" ); document.write( "-b/2a=-400/-4=100 width\r
\n" ); document.write( "\n" ); document.write( "l=400-2(100)
\n" ); document.write( "l=200\r
\n" ); document.write( "\n" ); document.write( "dimensions are 200ft by 100ft\r
\n" ); document.write( "\n" ); document.write( "
\n" ); document.write( "

Algebra.Com's Answer #445110 by richwmiller(17219)\"\" \"About 
You can put this solution on YOUR website!
a square yields the largest area.
\n" ); document.write( "the 400 ft will cover three equal sides
\n" ); document.write( "400/3=133.33 for each side
\n" ); document.write( "
\n" ); document.write( "
\n" );