Question

what is the area of a circle whose circumference is 31.3 cm​

Answer 1

Answer:

area of circle is equal to 77.944cm^2

Answer 2

Step-by-step explanation:

circumference of circle = 2πr = 31.3 cm

$2\pi \: r = 31.3 \\ 2 \times \frac{22}{7} \times r = 31.3 \\ r = 31.3 \times \frac{7}{22} \times \frac{1}{2} \\ r = 4.98cm$

area of circle

$\pi {r}^{2} \\ = \frac{22}{7} \times {(4.98)}^{2} \\ = \frac{22 \times 24.80}{7} \\ = 22 \times 3.54 \\ = 77.9sqcm$

hope you get your answer