Racetrack Design The accompanying figure depicts a racetrack with ends that are semicircular in shape. The length of the track is 1320 ft (1/4 mi). Find / and r such that the area of the rectangular region of the racetrack is as large as possible. (Round your answers to the nearest foot.) 1 = ft ft What is the area enclosed by the track in this case? (Round your answer to the nearest square foot.) ft²

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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**Racetrack Design**

The accompanying figure depicts a racetrack with ends that are semicircular in shape. The length of the track is 1320 ft (1/4 mi). Find \( l \) and \( r \) such that the area of the rectangular region of the racetrack is as large as possible. (Round your answers to the nearest foot.)

![Diagram of a racetrack with semicircular ends and a rectangular middle section, labeled with radii and length of rectangle.]

- \( r = \) _____ ft
- \( l = \) _____ ft

What is the area enclosed by the track in this case? (Round your answer to the nearest square foot.)

- _____ ft\(^2\)
Transcribed Image Text:**Racetrack Design** The accompanying figure depicts a racetrack with ends that are semicircular in shape. The length of the track is 1320 ft (1/4 mi). Find \( l \) and \( r \) such that the area of the rectangular region of the racetrack is as large as possible. (Round your answers to the nearest foot.) ![Diagram of a racetrack with semicircular ends and a rectangular middle section, labeled with radii and length of rectangle.] - \( r = \) _____ ft - \( l = \) _____ ft What is the area enclosed by the track in this case? (Round your answer to the nearest square foot.) - _____ ft\(^2\)
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