CREATE TABLE table_66248 ("Rank" FLOAT, "Heat" FLOAT, "Name" CLOB, "Nationality" CLOB, "Result" CLOB)

What is the Heat of the Player with a Rank of 18 or less and Result of 55.15?
SELECT "Heat" FROM table_66248 WHERE "Rank" < '18' AND "Result" = '55.15'
SELECT "Heat" FROM "table_66248" WHERE "Rank" < '18' AND "Result" = '55.15'