The area of a circle is $38.5\, m ^{2}$, then its circumference will be $\ldots \ldots \ldots \ldots m$.
The area of a circle is $38.5\, m ^{2}$, then its circumference will be $\ldots \ldots \ldots \ldots m$.
- A
$22$
- B
$2.2$
- C
$38.5$
- D
$3.85$
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