Is Built with one side against a bam If 1000 m of fencing are used for the other three sides of the pen what dimensions maximize the area of the pen b A rancher plans to make four identical and adjacent rectangular pens against a barn each with an area of 400 m see figure What are the dimensions of each pen that minimize the amount of fence that must be used a To maximize the area of the pen the sides perpendicular to the bar should be m long and the side parallel to the bar should be m long Type exact answers using radicals as needed Barn 400 400 400 400 b To minimize the amount of fence that must be used each of the sides perpendicular to the barn should bem long and each of the sides parallel to the barn should be m long Type exact answers using radicals as needed