Area of rectangle X = Area of right-angled triangle Y.<br><br>
&bull; Area of right triangle Y = \( \frac{1}{2} \times \text{base} \times \text{height} \) from the figure<br>
&bull; This equals the area of rectangle X = length × breadth<br>
&bull; Using the dimensions from the figure, find length and breadth of rectangle X<br>
&bull; Perimeter of rectangle X = 2 × (length + breadth) = 94 cm<br><br>
Final Answer: 94 cm