Question

the area of circle is 49πcm square . its circumference is ( in term of π )

Answer 1

$\pi {r}^{2} = 49\pi \\ {r}^{2} = 49 \\ r = 7 \\ hence \: circumference \\ = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 7 \\ = 44$
or 14π

Answer 2

area = 49π
πr2 =49π
r^2=49
r= 7
cicumfrancce=2πr
=2×22/7×7
=44cm