Final answer:
The approximate width of Alice's rectangular backyard, which has an area of 1,000 m² and a length twice its width, is 22.36 meters.
Step-by-step explanation:
We're given that Alice's backyard is rectangular and its length is twice as long as its width. Additionally, we know the area of her yard is 1,000 m². To find the width, we can set up an equation and solve for the unknown dimension.
Let's denote the width of the backyard as w meters. Since the length is twice the width, it would be 2w meters. The area of a rectangle is calculated by multiplying the length by the width, which can be expressed as:
Area = length × width
Substituting the known values, we get:
1,000 m² = w × 2w
Now, we solve for w:
1,000 m² = 2w²
Divide both sides by 2:
500 m² = w²
Take the square root of both sides:
w = √(500 m²)
w = 22.36 m
The approximate width of Alice's backyard is 22.36 meters.