CREATE TABLE table_64448 ("Rank" FLOAT, "Lane" FLOAT, "Name" TEXT, "Nationality" TEXT, "Time" TEXT)

Who placed highest with a time of 1:47.70?
SELECT MIN("Rank") FROM table_64448 WHERE "Time" = '1:47.70'
SELECT MIN("Rank") FROM "table_64448" WHERE "Time" = '1:47.70'