Table schema:
CREATE TABLE table_name_29 (main_contestant VARCHAR, total_score_week VARCHAR, co_contestant__yaar_vs_pyaar_ VARCHAR)

Question: Who is the main contestant with a total score/week of 42/60 and a co-contestant (Yaar vs. Pyaa) of Tina Sachdev?
SQL: SELECT main_contestant FROM table_name_29 WHERE total_score_week = "42/60" AND co_contestant__yaar_vs_pyaar_ = "tina sachdev"