|Rank|Name|Nationality|Time|
|---|---|---|---|
||Jorge Delgado|Ecuador|1:55.45|
||Rick DeMont|United States|1:55.96|
||Rex Favero|United States|1:57.08|
|4|Djan Madruga|Brazil|1:57.17|
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Question: how many ranked swimmers were from the united states?
Answer: 2