Math Problem Statement

Has de dir el perimetre de cada un dels costats, Quant mesura la pista I l'area

Tenim una pista de futbol rectangular que sabem que mesura el doble de llarg que d'ample, però no en sabem ben bé les dimensions. Hem enviat a un encarregat a mesurar-les però ell n'ha mesurat tot el perímetre junt (72m) i nosaltres volem saber cada un dels costats. Podem esbrinar-ne les dimensions sense haver de tornar a mesurar-la? Quant mesura la pista? Quina és la seva àrea?

Solution

The problem is asking about a rectangular football field where the length is double the width, and the total perimeter is 72 meters. We need to calculate the dimensions of the field (length and width), its total area, and how much space the field covers.

Step 1: Relationship between Length and Width

Let's denote the width by xx, and since the length is double the width, the length will be 2x2x.

Step 2: Perimeter Formula

The perimeter PP of a rectangle is given by:

P=2(length+width)P = 2(\text{length} + \text{width})

Substitute the length and width:

72=2(2x+x)72 = 2(2x + x)

Step 3: Solve for xx

Simplifying the equation:

72=2(3x)72 = 2(3x)

72=6x72 = 6x

x=726=12x = \frac{72}{6} = 12

So, the width xx is 12 meters, and the length 2x2x is:

2x=2×12=24 meters2x = 2 \times 12 = 24 \text{ meters}

Step 4: Calculate the Area

The area AA of a rectangle is given by:

A=length×widthA = \text{length} \times \text{width}

A=24×12=288 square metersA = 24 \times 12 = 288 \text{ square meters}

Final Answer:

  • Length: 24 meters
  • Width: 12 meters
  • Perimeter: Already given as 72 meters
  • Area: 288 square meters

Do you need more details, or have any other questions?

Here are some related questions:

  1. How do you calculate the perimeter if you know both dimensions?
  2. What is the formula for the area of other shapes like triangles or circles?
  3. How would the problem change if the length was 3 times the width?
  4. What units are commonly used for measuring area?
  5. How can you verify that the dimensions you find are correct?

Tip: Always double-check the dimensions by plugging them back into the perimeter and area formulas to verify your results!

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Math Problem Analysis

Mathematical Concepts

Geometry
Algebra

Formulas

Perimeter of a rectangle: P = 2(length + width)
Area of a rectangle: A = length × width

Theorems

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Suitable Grade Level

Grades 6-8