Question

What is the perimeter of a circle if its area is 49 sq​

Answer 1

Step-by-step explanation:

area of circle=49

$\pi \times r {}^{2} = 49 \\ \frac{22}{7} \times r {}^{2} = 49 \\ r = \sqrt{ \frac{49}{\pi} } = \frac{7}{ \sqrt{\pi} } \\ perimeter = 2\pi \times r \\ = 2\pi \times \frac{7}{ \sqrt{\pi} } \\ = 14 \sqrt{\pi}$