A circular park has a section where three - eighths of it is made into a playground. The radius of the park is 12 yards. What is the area of the part of the park that is not the playground?
Options
A
90π yd²
B
45π yd²
C
135π yd²
D
180π yd²
Answer & Analysis
Answer
A
Analysis
Question Analysis
The main focus is on using the area formula of a circle and fraction arithmetic to find the area of the non - playground part. First, calculate the total area of the circular park, then determine the fraction of the non - playground part, and finally multiply to get the result.
Key Concept Explanation
The area formula of a circle is , where is the radius. To find the area of a certain part of the circle, we multiply the fraction representing that part by the total area of the circle.
Step - by - Step Solution
1. Calculate the total area of the circular park using the formula . Given yards, square yards.
2. Determine the fraction of the park that is not the playground: .
3. Calculate the area of the non - playground part:
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