CREATE TABLE table_name_40 (laps INTEGER, time_retired VARCHAR, grid VARCHAR)
SELECT SUM(laps) FROM table_name_40 WHERE time_retired = "exhaust" AND grid < 15
ในกริดที่ 15 มีกี่รอบก่อนที่จะหมดเวลา?
In grid 15, how many laps were there before ending with a time of exhaust?