Answer:
The length of the warehouse is 280 feet.
Step-by-step explanation:
Let A be the area of the warehouse floor, W be its width, and L be its length.
A = W * L
We know that the length is twice the width:
L = 2W
Substitute the second equation into the first equation and we get:
A = 2W * W
Solve for W (A = 39200):
39200 = 2W * W
39200 = 2W²
19600 = W²
W = 140
Plug that number into the second equation to get the length:
L = 2 * 140
L = 280
So the length of the warehouse is 280 feet, the width is 140 feet, and the total area is 39200 ft²
