NationalHardAlgebra7–9

Quadratic Equations

Equações do 2º Grau

A rectangular field has a perimeter of $60$ m and an area of $200 \text{ m}^{2}$ . Find the dimensions of the field.

Let length $= l$ and width $= w$ . You know $2(l + w) = 60$ and $l \times w = 200$ . Express $l$ in terms of $w$ , then solve the quadratic.

Solution

Step 1 of 8