A cow is attached to a rope 10 feet long in a pasture bordered by two fence( more than 10 feet long) meeting at an angle of 60 degree. What is the area of the space in which the cow is grazing?

a. 20 pi
b. 5 pi /3
c. 20 pi /3
d. 50 pi /3
e. 100 pi

please answer and explain

Do the two fence meet at the same place where the rope is attached?

If so, what do you think the diameter of the circle is in which the cow can roam?