Answer:
L=28 yd
W=14 yd
Explanation:
Here's what we know:
Length=L
Width=W
L*W=392 yards^2
L=2*W
We rewrite the equation to look like:
2W*W=392 yd^2
So, the simplified version of the new equation is 2W^2=392 yd^2
To find the answer, divide both sides by 2, and you'll find that W^2=196. To find W, simply take the square root of both sides and you'll find that W=14 yd
Now that you know what W is, you can plug it back into the equation for length.
L=2(14)
L=28 yd