The distance around one of the semicircles at either end of the soccer field is:
c = 1/2 * pi * d
where d is the diameter of the semicircle, which is equal to the width of the soccer field, 40 yards.
c = 1/2 * pi * 40
c = 20 * pi
Using a calculator, we get:
c ≈ 62.83 yards (rounded to two decimal places)
Therefore, the distance around one of the semicircles at either end of the soccer field is approximately 62.83 yards.