A farmer wants to make a rectangular plot whose area is60metres squared.the length is2metres more than twice the width.find the length and width

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Step-by-step solution

6 steps

Let's solve this problem step-by-step.

  1. Define variables.

    Let w be the width of the rectangular plot in meters.
    Let l be the length of the rectangular plot in meters.

  2. Write down the given information as equations.

    The area of a rectangle is given by the formula:
    Area = l × w
    We are given that the area is 60 m², so:
    60 = l × w (Equation 1)

    We are also given that the length is 2 meters more than twice the width:
    l = 2w + 2 (Equation 2)

  3. Substitute Equation 2 into Equation 1.

    Substitute (2w + 2) for l in Equation 1:
    60 = (2w + 2) × w

  4. Simplify and solve the quadratic equation for w.

    60 = 2w² + 2w
    Rearrange the equation to the standard quadratic form (ax² + bx + c = 0):
    2w² + 2w - 60 = 0
    Divide the entire equation by 2 to simplify:
    w² + w - 30 = 0
    Factor the quadratic equation. We need two numbers that multiply to -30 and add to 1. These numbers are 6 and -5.
    (w + 6)(w - 5) = 0
    This gives two possible solutions for w:
    w + 6 = 0 ⟹ w = -6
    w - 5 = 0 ⟹ w = 5
    Since width cannot be negative, we discard w = -6.
    So, the width is w = 5 meters.

  5. Calculate the length using the value of w.

    Substitute w = 5 into Equation 2:
    l = 2w + 2
    l = 2(5) + 2
    l = 10 + 2
    l = 12 meters

  6. Verify the area.

    Area = l × w = 12 m × 5 m = 60 m². This matches the given area.

    The length of the plot is 12 meters and the width is 5 meters.

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