To exchange or not to exchange?

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.

Related posts:

1. CBM Blog: One diagonal, and to exchange or not to exchange? ...
2. ChessBase DVDs – The Art of the Exchange Sacrifice ...

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