Hindustan Zinc Limited (HZL) reported a 81% jump in net profit y-o-y to Rs 1,876 crore in the first quarter of FY18, on strong zinc prices. During the quarter under review, the company's revenues shot up 79% year-on-year (y-o-y) to Rs 4,961 crore, led by higher zinc & lead prices and higher volume.The revenue and cost of production led to a 113% increase in EBITDA during the quarter to Rs. 2,404 crore, the company said in a statement issued on Thursday. The impact of higher EBITDA was partly offset by lower investment income on a smaller investment corpus post dividend pay-out and interest cost on temporary Commercial Paper, the statement added.