Question

Find the circumference of a circle with an area of 13 cm

Answer 1

area of the circle

$\pi \: r ^{2}$

22/7 x r^2 = 13

r^2 = 4.13

r = 2.03

circumference of the circle

$2\pi \: r$

= 2 x 22/7 x 2.03

= 12.77 (approx.)

Answer 2

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