- Consider a circle of radius 10 cm and area of 314 sq.cm.
C= 2 * pie * r.
After substituting the values we will get C= 2 * (22/7) * 10 and the final answer is 62.8 cm.
By using the second equation,
C= (4 * Area of circle)/diameter
After substituting the values,
C= (4 * 314)/20 = 62.8 cm.
Thus we found out the value of circumference of the circle using area as well as using the radius of the circle.