Mumbai, Oct 11: Hindustan Zinc. has more than trebled its net profit at Rs 94.64 crore for the second quarter ending September 30, 2003, compared to Rs 31.1 crore in same period previous fiscal. Total income in the period under review has also increased to Rs 453.49 crore as against Rs 323.4 crore in Q2 of last financial year, the company informed the Stock Exchange, Mumbai, on Friday. Bureau Report