Math Problem Statement
The perimeter of a rectangle is 40 inches. Find the length and width if the length is an integer and the width is 2 times the next consecutive integer.
Solution
Let's denote the length of the rectangle as and the width as .
Given:
- The perimeter of the rectangle is 40 inches.
- The width is 2 times the next consecutive integer after the length.
Step 1: Set up perimeter equation
The formula for the perimeter of a rectangle is: Since : Dividing both sides by 2:
Step 2: Define in terms of
According to the problem, the width is "2 times the next consecutive integer." This means .
Step 3: Substitute into the perimeter equation
Substitute into : Expanding and simplifying:
Step 4: Find
Now, substitute back into :
Solution
The length is 6 inches, and the width is 14 inches.
Verification
To confirm, check the perimeter: Thus, the solution is correct.
Would you like further details or have any questions about this problem?
Related Questions
- What would the length and width be if the perimeter were 60 inches instead of 40?
- If the width were 3 times the next consecutive integer after the length, how would the dimensions change?
- How would you find the dimensions if the length is given as twice the width?
- What are the possible integer pairs for length and width if only the perimeter is known?
- How does this solution approach change if both length and width are unknown?
Tip: For perimeter problems, setting up clear equations based on the definitions can simplify solving for unknowns.
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Math Problem Analysis
Mathematical Concepts
Algebra
Geometry
Linear Equations
Formulas
Perimeter of a rectangle: P = 2L + 2W
Theorems
-
Suitable Grade Level
Grades 6-8
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