Answer
The rhino's ancestor is taller.
Work Step by Step
We add the heights of the basketball players:
$$ 2.03 + 1.93 + 2.18 \ meters \\ 6.14 \ meters $$
The difference in the sum of the player heights and the rhino ancestor's height is:
$$ 6.4 - 6.14 \ meters \\ .26 \ meters$$
The ancestor of the rhino is .26 meters taller than the sum of the heights of the players.
