Concept explainers
To find: Pamela requires 3 hours to swim 15 miles downstream on the Illinois River. The return trip upstream takes 5 hours. Find Pamela's average speed in still water. How fast is the current? (Assume that Pamela's speed is the same in each direction).
Answer to Problem 66AYU
Solution:
Explanation of Solution
Given:
Pamela requires 3 hours to swim 15 miles downstream on the Illinois River. The return trip upstream takes 5 hours.
Calculation:
Pamela requires 3 hours to swim 15 miles downstream in the Illinois river.
It is given that time
So the rate
The return trip upstream takes 5 hours.
It is given that time
So the rate
Let her swim speed be "s".
Let her current speed be "
Downstream:
upstream:
Adding both equations we have,
since
Chapter 11 Solutions
Precalculus Enhanced with Graphing Utilities
Additional Math Textbook Solutions
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (4th Edition)
Calculus and Its Applications (11th Edition)
Precalculus
Calculus & Its Applications (14th Edition)
Glencoe Math Accelerated, Student Edition
University Calculus: Early Transcendentals (3rd Edition)
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning