A class will be for a duration of an hour and if it is a special class, it might be for three to four hours but a lecturer has taken a class for about 150 hrs and created guinness world record. This lecturer 's name is Maruthi Rao and he is a commerce lecturer in Zaheerabad of Medak District . Maruthi Rao's efforts for about a week has fulfilled the dream of achieving guinness world record . . . . .