Question 28
In the figure below, $S$ is on $QR$ and $U$ is on $PR$. Segments $PS$ and $QU$ intersect at $T$. It is given that $PT=TS$ and $QS=2RS$. If the area of $\triangle PQR$ is $150$ cm$^2$ and the area of $\triangle PSU$ is $x$ cm$^2$, find $x$.
