alleryStart learning →The area of a circular region of radius r is given by:
ATwo pi r
BFour pi r
CPi r squared
DPi r cubed
Answer & Solution
Correct answer: C. Pi r squared
1. Area grows with the square of the radius.
2. The constant of proportion is pi.
3. So the area is pi r squared.
_Source: syllabus Mathematics Class X, Chapter 12, Areas Related to Circles._
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