Andy wants to cross a river that is 1 kilometer wide and get to a point 4 kilometers downstream. (See Figure 2.) He can swim at 4 kilometers per hour and run 10 kilometers per hour. Assuming that he begins by swimming and that he swims toward a point x kilometers downstream from his initial starting point A. how long will it take him to reach his destination D?

Transcribed Image Text:

-4-x-