Math Problem Statement

The area of a rectangular plot is 528 m 2 . The length of the plot (in metres) is one than twice its breadth. We need to find the length and breadth of the plot.

Solution

Let's define the breadth of the rectangular plot as bb meters. According to the problem, the length of the plot is "one meter more than twice its breadth." This can be expressed as:

Length=2b+1meters\text{Length} = 2b + 1 \, \text{meters}

The area of a rectangle is given by:

Area=Length×Breadth\text{Area} = \text{Length} \times \text{Breadth}

Substituting the given area (528 m²) and the expressions for length and breadth into this equation:

528=(2b+1)×b528 = (2b + 1) \times b

Now, let's solve for bb (breadth) by expanding and rearranging the equation:

528=2b2+b528 = 2b^2 + b

Rearranging the equation:

2b2+b528=02b^2 + b - 528 = 0

This is a quadratic equation. We'll use the quadratic formula to solve for bb:

b=1±124(2)(528)2(2)b = \frac{-1 \pm \sqrt{1^2 - 4(2)(-528)}}{2(2)}

b=1±1+42244b = \frac{-1 \pm \sqrt{1 + 4224}}{4}

b=1±42254b = \frac{-1 \pm \sqrt{4225}}{4}

b=1±654b = \frac{-1 \pm 65}{4}

Taking the positive root (since dimensions cannot be negative):

b=1+654=644=16b = \frac{-1 + 65}{4} = \frac{64}{4} = 16

Thus, the breadth b=16b = 16 meters.

Now, using the expression for the length:

Length=2b+1=2(16)+1=32+1=33meters\text{Length} = 2b + 1 = 2(16) + 1 = 32 + 1 = 33 \, \text{meters}

Final Answer:

  • Length = 33 meters
  • Breadth = 16 meters

Would you like further clarification or details?

Here are 5 related questions you can explore:

  1. How do you solve quadratic equations using factorization?
  2. What other methods can be used to find the roots of quadratic equations?
  3. How do you calculate the perimeter of a rectangle with the given dimensions?
  4. What is the formula for the diagonal of a rectangle, and how do you find it for this plot?
  5. How would the equation change if the area of the plot were 600 m² instead of 528 m²?

Tip: When solving quadratic equations, always check for both the positive and negative roots to ensure the correct real-world interpretation.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Geometry

Formulas

Area of a rectangle = Length × Breadth
Quadratic equation formula: ax² + bx + c = 0

Theorems

Quadratic Formula

Suitable Grade Level

Grades 8-10