Trigonometry · Challenge problem

Two ships leave the same port together. Ship $P$ steams at $20$ km/h on bearing $\text{N}30^\circ\text{E}$; ship $Q$ steams at $15$ km/h on bearing $\text{S}60^\circ\text{E}$. After $2$ hours, how far apart are they and what is the bearing of $Q$ from $P$?