CREATE TABLE table_22648285_1 (miles__km_ VARCHAR2, race_time VARCHAR2)

How many miles were driven in the race where the winner finished in 2:47:11?
SELECT miles__km_ FROM table_22648285_1 WHERE race_time = "2:47:11"
SELECT "miles__km_" FROM "table_22648285_1" WHERE "2:47:11" = "race_time"