Question

find the radius and circumference of a circle whose area 1386cm
$\sqrt[?]{?}$
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Answer 1

Explanation:

Area of circle=πr²

1386=22/7*r²

(1386*7/)22=r²

9702/22=r²

441=r²

√441=r

21=r

Since radius of circle=21cm

therefore,

circumference of a circle=2πr

=2*(22/7)*21

=2*22*3

=44*3

=132cm²

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