Math Problem Statement
The perimeter of a rectangle is 116 centimeters. Find the length and width if the length is an even integer and the width is 5 times the next consecutive even integer.
Solution
Let's denote the length of the rectangle by and the width by .
Step 1: Expressing the perimeter
The formula for the perimeter of a rectangle is: We are given that the perimeter is 116 centimeters, so: Dividing both sides by 2: l + w = 58 \tag{1}
Step 2: Expressing the width in terms of the length
We are told that the length is an even integer, and the width is 5 times the next consecutive even integer. If the length is , the next consecutive even integer is . Thus, the width can be written as: w = 5(l + 2) \tag{2}
Step 3: Substitute the width into the perimeter equation
Now substitute equation (2) into equation (1): Simplify the equation: Subtract 10 from both sides: Divide by 6:
Step 4: Find the width
Now that we have , substitute it back into equation (2) to find the width:
Step 5: Conclusion
The length of the rectangle is centimeters, and the width is centimeters.
Would you like more details on this solution?
Here are some follow-up questions:
- How would the formula change if the width were expressed as a function of the previous even integer?
- What would the dimensions be if the perimeter were 120 cm instead of 116 cm?
- Can you find the area of the rectangle with the given dimensions?
- How does the perimeter formula change if we consider shapes other than rectangles?
- What would the result be if both the length and width were odd integers?
Tip: Always check if you can substitute values directly into the equation before solving for unknowns—it simplifies the process.
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Math Problem Analysis
Mathematical Concepts
Algebra
Geometry
Linear Equations
Formulas
Perimeter of a rectangle: P = 2(l + w)
Theorems
-
Suitable Grade Level
Grades 6-8
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