Question 830589
We're given the following information:
L = 4W
The perimeter is a fence.  It needs 2 pieces for the length and 2 pieces for the width.  2L + 2W = 60
Since we know that L = 4W, let's substitute that value into the equation.
2(4W) + 2W = 60
8W + 2W = 60
10W = 60
Divide by 10 on each side:
W = 6
If W = 6, then L = 4 times that, or 24.
.
Now that we have the measurements, we can find the area by multiplying Length by Width.
6 * 24 = 144



PS No apostrophe for "its" unless it's "it is".  His, hers, its (no apostrophes for the genitive case for pronouns.)