00:01
Okay, so in this problem we're given that the perimeter is 484.
00:06
Let me make sure of units on that.
00:10
484 feet.
00:14
And we're also told that the length is 4 .5 times the width.
00:28
So when you're given problems like this, you want to write down any formulas that aren't discreetly given.
00:34
So in this case, that's perimeter.
00:37
Since we're talking about rectangles, the perimeter of a rectangle is just two times length.
00:45
Plus two times width.
00:47
It's just adding up all four sides.
00:49
In this case, that's going to equal 484.
00:53
We already have an expression for length, so we can replace length with 4 .5 times w.
01:03
So we're going to have 2 times 4 .5 w plus 2 w equals 484...