The area of a circle is 154 cm². Find its circumference. (Use pi = 22/7)
A36 cm
B44 cm
C52 cm
D66 cm
Explanation
Area = pi * r^2 = 154 => (22/7) * r^2 = 154 => r^2 = 49 => r = 7 cm. Circumference = 2 * pi * r = 2 * (22/7) * 7 = 44 cm.
Exam Relevance
- Topic: Geometry & Mensuration
- Subtopic: Circles
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