00:01
All right, we have a rectangle.
00:06
It's a garden or a field or something.
00:09
And it's divided into four pieces side by side, four equal pieces like this.
00:17
And the area is 5 ,000 meters.
00:19
Well, how do you find the area of a rectangle? you multiply the length times the width.
00:26
Okay, but instead of using l and w, let's use x and y.
00:30
So this one can be x.
00:32
And if the bottom is x, then the top here is also x, not y, is also x.
00:40
Because x stands for the length, and those two links have to be the same.
00:44
And then that means the vertical ones all are y's.
00:52
All right.
00:52
So since the area is 5 ,000 meters, we know that x times y equals 5 ,000.
01:01
And we are trying to minimize the amount of fencing...