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Dimensions of a Rectangle The perimeter of a rectangle is 70, and its diagonal is 25. Find its length and width.
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To find: The length and width of given rectangle.
Answer to Problem 43E
The length and width of given rectangle are 15 and 20.
Explanation of Solution
Given:
Perimeter of rectangle is 70 and diagonal is 25.
Calculation:
Let the length of rectangle is l, width of rectangle is w and diagonal of rectangle is d.
Formula of perimeter of rectangle is,
Solve equation (1) for l,
Diagonal of rectangle divides the rectangle in right triangle, use Pythagoras theorem to get the equation,
Substitute 25 for d and
Further, solve above equation for w,
From above equation the values of w,
Two possible value of w give two corresponding values of l.
Substitute 15 for w in equation (1) to get the value of l,
Substitute 20 for w in equation (1) to get the value of l,
Thus, the length and width of given rectangle are 15 and 20.
Chapter 10 Solutions
Precalculus: Mathematics for Calculus - 6th 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
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