00:01
Hi there, so for this problem, we're, we are told that you're putting up a wall that will enclose a rectangular area and the rectangular area for this is 640 feet.
00:12
1 wall will made will be along this street and the price for that is 24.
00:20
And for the order 3, the price will be 12 and it is made of wood.
00:25
So we need to find the length of the wall along this street.
00:29
So that will be the value in this case that we label as ads.
00:33
That will minimize the total cost of the walls.
00:36
Now, 1st of all, we know that then the already that we close.
00:40
Following the labels that we put in here.
00:46
It's just x times y.
00:48
So in here, what we can do is to solve for y.
00:51
So y is equal to 600.
00:53
Divided by x.
00:55
Now, let's write the cost function.
00:58
Now, the cost function is just the side.
01:01
Times the price for that, so for example, we start with ads, so that will be 24 times ads.
01:07
Then we'll have the other side ads with a price of 12.
01:17
Simplifying this, the cost function is then 36...