To exchange or not to exchange?

12/26/2009 – Correct evaluation of pawn endings is an important pillar of good endgame technique. So, e.g., in the following position Black had to come to a  judgment as to whether, after the exchange of rooks with 47...Rxe2 48.Kxe2, the ensuing pawn ending is a draw. Otherwise, he would be obliged to do without the exchange and to defend the rook ending. What do you think? Does the exchange of rooks lead to a drawn position? The solution is here, but first ponder over it with a  larger version of the diagram.