CREATE TABLE table_1751142_2 (shuttle_time__seconds_ VARCHAR, speed__km_h_ VARCHAR)

What is the shuttle time for the level where the speed is 15.5 km/h?
SELECT shuttle_time__seconds_ FROM table_1751142_2 WHERE speed__km_h_ = "15.5"
SELECT "shuttle_time__seconds_" FROM "table_1751142_2" WHERE "15.5" = "speed__km_h_"