CREATE TABLE table_75224 ("Sport" TEXT, "Record" TEXT, "Nation" TEXT, "Date" TEXT, "Time  ( sec. ) " FLOAT)

Which nation finished with a time of 47.049?
SELECT "Nation" FROM table_75224 WHERE "Time (sec.)" = '47.049'
SELECT "Nation" FROM "table_75224" WHERE "Time (sec.)" = '47.049'