In the above problem, when the man has walked once around the platform, so that he is at his original position on it, what is his angular displacement relative to ground?

In the above problem, when the man has walked once around the platform

1.	In the above problem, when the man has walked once around the platform, so that he is at his original position on it, what is his angular displacement relative to ground?
Answer» `(6)/(5)pi` `(5)/(6)pi` `(4)/(5)pi` `(5)/(4)pi` ANSWER :B