How many movies have K. S. Prakash Rao and Rao Gopal Rao collaborated on?

They have worked on 6 movies together! Their first movie together was Rowdy Ramudu Konte Krishnudu (1980) while their highest rated movie together was Kondaveeti Simham (1981). They have not worked together since Agni (1989). They are most known for their action films together.