HELP PLS - The ratio of the width to the length in rectangle ABCD is 4 : 5 if the area of the rectangle is 2,000 square meters, then which in the length of the rectangle?

Length of the rectangle is 40 meters.
Step-by-step explanation:
Area of the rectangle = length × width
2000 = 5x × 4x
2000 = 20x²
⇒ x² = 2000/20 = 100
∴ x = 10
4x = 40 m