1. The problem statement, all variables and given/known data A passenger on a boat moving at 1.5m/s on a still lake walks up a set of stairs at .5m/s. he stairs are angled at 45 degrees in the direction of motion as shown. What is the velocity of the passenger relative to the water. 2. Relevant equations 3. The attempt at a solution How do I find the horizontal velocity of the passenger. Do I take half of the velocity because the angle is 45 degrees? I don't know which equations I should use to find the passengers horizontal velocity.