Let b = width l = length Then, l = 2b - 2 ----------(i) and, Perimeter = 86 cm => 2(l+b) = 86 => 2b - 2 + b = 86/2 => 3b = 43 +2 => b = 45/3 = 15 => b = 15 Putting the value of b in equation(i) And, l = 2×15 - 2 = 30-2 = 28 Hence, length = 28 cm width = 15 cm
