What is the maximum area that can be created with 200 feet of fencing? What are the dimensions of this playground? You may need to explore with different combinations of lengths and widths to get a perimeter of 200 feet. Remember that your fence will make up the perimeter of the playground. Use the perimeter formula P=2l+2w to help you. The area will be how much space your playground covers. Once you have a length and width, use the area formula A=lw to find the area of your playground.