Perimeter = 2 × (Length + Breadth).<br><br>&bull; Length = \(z\) cm, Breadth = \(z - 5\) cm<br>&bull; Perimeter = \(2(z + (z - 5))\)<br>&bull; = \(2(2z - 5) = 4z - 10\) cm<br><br>Final Answer: D: \(4z - 10\)