1. The problem statement, all variables and given/known data [PLAIN]http://img214.imageshack.us/img214/194/calcdr.jpg [Broken] I need to find the optimal path across two points, in two straight line segments. The speed from point A to B is 12ft/s, and 4ft/s from point B to C. 2. Relevant equations 3. The attempt at a solution I set segment AB as x, BC as y, ED as w, and DC as z. With that, I set up the equations: x/12 + y/4 = P and w + z = 100 However, I am stumped at how to progress from here on. I tried playing around with the trigonometric functions in the triangle, but that seemed to complicate the problem even more. Does anyone has any insight into this?