Alice’s backyard is a rectangular piece of property that is twice as long as it is wide. The total area of her yard is 1,000 m2. What is the approximate width of her backyard?A = lw
Answer
A
11.2 m
B
15.8 m
C
22.4 m
D
44.8 m
Explanation
Let the width be w, so the length is 2w. Using A = lw gives 1,000 = 2w², so w² = 500 and w = √500 ≈ 22.4 m. The approximate width is 22.4 m, choice C.
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