MATHEMATICS · Subjective · AP · Calculus AB · Analytical Applications of Differentiation · Analytical Applications of Differentiation
Problem
Now try these problems on your own. The answers are in Chapter 23, starting on page 487.
5. A swimmer is at a point 500 m from the closest point on a straight shoreline. She needs to reach a cottage located 1,800m downshore from the closest point. If she swims at 4m/s and she walks at 6m/s, how far from the cottage should she come ashore so as to arrive at the cottage in the shortest time?