document.write( "Question 121029: Old MacDonald wants to build a rectangular pen for his animals. He has 40 m of fencing and he plans to use the barn as one side for his pen. What dimensions will give him a maximum area? \n" ); document.write( "
Algebra.Com's Answer #88875 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! I APOLOGIZE FOR THE INCORRECT ANSWER. \n" ); document.write( "IT SEEMS THAT A 10 BY 20 BY 10 RECTANGULAR PEN GIVES AN AREA OF 10*20=200 M^2 WHICH IS THE MAX AREA. I OVERLOOKED THE WORD RECTANGULAR BECAUSE A SQUARE IS A SPECIAL RECTANGLE. \n" ); document.write( "----------------------------------------------------------------------------- \n" ); document.write( "A SQUARE IS THE MAXIMUM AREA WITH A MINIMUM PERIMETER. \n" ); document.write( "HOWEVER YOU ONLY NEED 3 SIDES OF FENCE. \n" ); document.write( "THUS YOU NEED TO DIVIDE YOUR FENCING BY 3 TO GET THE SQUARE. \n" ); document.write( "40/3=13.333 M IS THE LENGTH OF THE EACH SIDE. \n" ); document.write( "THIS GIVES AN AREA OF: \n" ); document.write( "13.333*13.333=177.769 M^2. \n" ); document.write( " |