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The circumference of a circle is found with the expression:

APi d cubed
BFour pi d
CTwo pi r
DPi r cubed
Answer & Solution
Correct answer: C. Two pi r
1. Here r is the radius. 2. The circumference is 2 pi r. 3. It is used to compare rounds of a circle. _Source: syllabus Mathematics, Chapter 11, Mensuration._
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