SELECT "Race Time" FROM table_21918 WHERE "Average Speed (mph)" = '113.835'
For races with an average speed of 113.835 mph, what are the winning race times?
CREATE TABLE table_21918 (
    "Year" real,
    "Date" text,
    "Driver" text,
    "Manufacturer" text,
    "Laps" real,
    "Miles (km)" text,
    "Race Time" text,
    "Average Speed (mph)" text
)