ISEE Word Problems Question 129: Answer and Explanation
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Question: 129
11. Find the circumference of a circle whose radius is 21 feet.
- A. 65.94 feet
- B. 132 feet
- C. 153 feet
- D. 1769.4 feet
Correct Answer: B
Explanation:
The correct answer is (B). Circumference = π o diameter; diameter = 2 o radius; π = 
C = π o 21 o 2
C = 42 o π = 42 o 
= 132'
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