The circumference of a circular disk is approximately 67.23 centimeters. The diameter of the disk is 21.4 centimeters.
To find the circumference of a circle, you can use the formula C = πd, where C is the circumference, π is pi (approximately 3.14), and d is the diameter of the circle.
Given that the diameter of the disk is 21.4 centimeters, we can plug this value into the formula to find the circumference:
C = πd
C = 3.14 x 21.4
C ≈ 67.276 centimeters
Therefore, the circumference of the circular disk is approximately 67.28 centimeters.