Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_1751142_2 (shuttle_time__seconds_ VARCHAR, speed__km_h_ VARCHAR)

### Question ###
What is the shuttle time for the level where the speed is 15.5 km/h?

### Accurate SQL ###

SELECT shuttle_time__seconds_ FROM table_1751142_2 WHERE speed__km_h_ = "15.5"