two fields have the same perimeter one is a square of side 72m and another is rectangle of length 80m which feild has the greater area and by how much?
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perimeter of square = perimeter of rec. (side)^2 = l*b. (72)^2 = 80*b. 5184 = 80b. b = 5184/80 = 64.8m. now , area of square = 5184 m so, area of rectangle = l x b = 80 x 5184/80 = 5184m. hence both have equal area.
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