1. The problem statement, all variables and given/known data Ship A travels at 10 knots on a due north course and passes a buoy at 8am. Ship B, travelling on a due east course passes the same buoy at 10am. How fast are the ships separating at 12 am? 2. Relevant equations 3. The attempt at a solution I'm not familiar with knots and don't know what knots are in km/h. Also, how fast is Ship B traveling then?