Answer: Choice B
Explanation:
The formula for the area of a circle is πr², and the radius is 1/2 of the diameter.
In the circle shown, the diameter is 18 m. Since the radius is half the diameter, the circle's radius is 9 m.
Inputting this value into this equation gives us π·9², or 81π. Putting this into a calculator or solving it with an approximation of pi gives us a number close to 254.46 m².
The closest option to that is B, so that is your answer.