00:01
We want to find the maximum area of a rectangle of a garden when we're given 200 yards of fencing.
00:06
So let's go ahead and draw out what we're actually working with in this problem.
00:12
So we have some rectangle.
00:14
Let me do this in a different color, actually.
00:17
So we have some rectangle here.
00:21
So we'll have the length and the...
00:25
Let me do it the other way.
00:26
So we'll have the length and the width of this.
00:29
So we want to find area.
00:33
So we know the area is length times width.
00:37
And we have 200 yards of fencing, which is really telling us this is going to be our perimeter that we're going to use.
00:46
So we know the perimeter of a rectangle is, so p is equal to 200, but this is also equal to two times of length plus two times our width.
01:02
And we could go ahead and divide each of this by 2 to give 100 is equal to length plus width.
01:14
Now notice if we were to, actually let me move this over here...