A motorboat is heading straight across a channel at 8 kph while a tidal current runs at 6 kph at right angles to the motorboat's direction. The boat ends up 3 km downstream from where it was aiming. How long did it take it to cross the river, and what was its speed across the river bottom?  

Answer rating: 100% (QA)

To solve this problem we can treat it as a vector addition problem to find the boats actual velocity ... View the full answer