SEAMO 2027 - Paper C - SET 02 - Self-study Question 5

The rectangle is divided into several parts by line segments. The areas of two triangles and one quadrilateral are marked as $13\text{ cm}^2$, $35\text{ cm}^2$ and $49\text{ cm}^2$. What is the area of the shaded region, in $\text{cm}^2$?