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Perimeter=4l=4×l ,or,4×12=48
Area = 3*45 = 135 square feet. Perimeter = 2*(3 + 45) = 2*48 = 96 feet.
Watch closely:48/4 = 12 feet
Perimeter = 2*(Length + Width) = 2*(15+9) = 48 feet.
Length = 16 feetWidth = 8 feetDistance around the perimeter =Length + width + length + width = 16 + 8 + 16 + 8 = 48 feet.