On the extension of $PQ$ of a right triangle $PQR$ where $\angle PRQ=90^o$, the point $S$ is marked after the point $Q$ so that $SR=2QR$. Let $H$ be the foot of the altitude from $R$. If the distance from the point $H$ to the side $QR$ is equal to the length of the segment $HP$, $\angle QSR=?$