Vedanta Group firm Hindustan Zinc on Wednesday posted 1.47 rise in profit at 948.72 crore for the second quarter of the current fiscal, as against the year-ago period, on improved demand and rising prices. “The increase was primarily on account of higher volumes and improved London Metal Exchange prices,” the company said in a statement. Hindustan Zinc had a net profit of `934.95 crore in the same quarter last fiscal. The revenues moved up in Q2 FY11 to `2,162.8 crore, around 21 per cent, as compared to `1,789.5 crore in the same period last fiscal.