Math, asked by ariba345, 9 months ago

plz plz help this question..

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Answers

Answered by harsaanu

1

Answer:

answer is for a is 21

Step-by-step explanation:

π×r×r=1386

22/7×r×r=1386

22×r×r=1386×7

rsquare=1386×7/22

rsquare=9702/22

rsquare=441

r=√441

r=21

hope it is useful

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