Question: RACETRACK DESIGN The accompanying figure depicts a racetrack with ends that are semicircular in shape. The length of the track is 1760 ft (1/3 mi). Find l and r so that the area enclosed by the rectangular region of the racetrack is as large as possible. What is the area enclosed by the track in this case?
![2183_21.png](https://secure.tutorsglobe.com/CMSImages/2183_21.png)