A Camel Race Enigma

Story: An Arab sheikh tells his two sons to race their camels to a distant city to see who will inherit his fortune. The one whose camel is slower will win. The brothers, after wandering aimlessly for days, ask a wise man for advise. After hearing the advice they jump on the camels and race as fast as they can to the city.

Question: What does the wise man say?

Solution: The wiseman tells them to switch camels.