Question

the circumference of a circle is 616 metre find its radius and area​

Answer 1

Answer:

circumference of circle 2πr

2× 22/7 × r = 616

44/7 ×r = 616

r= 616×7/44

r = 98 m

area of circle = πr²

22/7×98×98

30184m²

Answer 2

Answer:

$\sf \: \pi {r}^{2} = 616 \\ \\ \sf \: {r}^{2} = \frac{616 \times 7}{22} \\ \ \\ \sf\: {r}^{2} = 28\times 7 \\ \\ \sf \: r = 14 \\ \\ \sf \: Circumference = 2\pi r = 2 \times \frac{22}{7} \times 14 = 88cm \\ \\ \sf \: Circumference_{(Circle)} \blue{=88cm}$