CREATE TABLE table_name_19 (date_performed VARCHAR(255), main_contestant VARCHAR(255), scores_by_each_individual_judge VARCHAR(255))
What Date performed has a Scores by each individual judge of 10 + 10 + 10 = 30, and a Main contestant of karanvir bohra?
    
SQL: SELECT date_performed FROM table_name_19 WHERE scores_by_each_individual_judge = 10 + 10 + 10 = 30 AND main_contestant = "karanvir bohra"