Join the growing community of curious minds on IDNLearn.com and get the answers you need. Get accurate and comprehensive answers to your questions from our community of knowledgeable professionals.

(a) The perimeter of a rectangle is 96 m. Its length is 3 times its width. Find its length and width.

Sagot :

Of course! Let's solve the problem step-by-step.

1. Understand the given information:
- The perimeter of the rectangle is 96 meters.
- The length of the rectangle is 3 times its width.

2. Set up the formulas and variables:
- Let the width of the rectangle be [tex]\( w \)[/tex].
- According to the problem, the length will then be [tex]\( 3w \)[/tex].

3. Formula for the perimeter of a rectangle:
- The perimeter [tex]\( P \)[/tex] of a rectangle is given by the formula:
[tex]\[ P = 2 \times (\text{length} + \text{width}) \][/tex]
- Substitute the given perimeter and the expressions for length and width into the formula:
[tex]\[ 96 = 2 \times (3w + w) \][/tex]

4. Simplify the equation:
- Combine the terms inside the parentheses:
[tex]\[ 96 = 2 \times 4w \][/tex]
- This simplifies to:
[tex]\[ 96 = 8w \][/tex]

5. Solve for the width ( [tex]\( w \)[/tex] ):
- Divide both sides of the equation by 8:
[tex]\[ w = \frac{96}{8} \][/tex]
[tex]\[ w = 12 \][/tex]

6. Find the length ( [tex]\( l \)[/tex] ):
- The length is 3 times the width:
[tex]\[ l = 3 \times w \][/tex]
[tex]\[ l = 3 \times 12 \][/tex]
[tex]\[ l = 36 \][/tex]

7. Conclusion:
- The width of the rectangle is 12 meters.
- The length of the rectangle is 36 meters.