Question

find the redious of a circle whose area is 1386 cm​

Answer 1

Step-by-step explanation:

area of cirle....pie R square

1386=22/7×r×r

1386×7/22=r

441=r square

21 radius.....

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Answer 2

Answer:

area = pie r²

1386=22/7 ×r²

1386×7=r²×22

9702=r²×22

r²=9702/22

r²=441

r =21

radius of the circle is 21cm

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