Find the area of circle whose circumference is 21 pi cm.
Answers
Answered by
2
Answer:
area= pi r square
22/7×21×21
=1386cm^2
Answered by
1
Answer:
693/2
Step-by-step explanation:
Circumference of the circle = 2πr
21π = 2πr
r = 21/2
therefore,
area of the circle = πr²
= 22/7 ×21²/2²
= 693/2
= 346.5
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