Hi.
The problem asks us to find the length of the vegetable patch. In order to do this, we have to use the formula necessary to calculate the area of a rectangle.
A = WL
where A = area, W = width, and L = length.
Next, we have to plug in to the formula the values we know. The problem gives us the area (28 square meters) and the width (4 meters).
So:
28 = 4L
Third, we have to get L all by itself. To do this, we divide each side by 4:
28/4 = L
Therefore, L (the length of the rectangle) is 7 meters.
