Improving realisations helped UltraTech Cement post a robust 21.6 per cent year-on-year revenue growth in the September quarter. From Rs 228 for a 50-kg bag in the September quarter last year, the average cement price in the country rose to Rs 247 in the quarter this year. UltraTech, which has a good presence in South India, benefited further as prices there improved from Rs 210 a bag to Rs 278 a bag over the same period. Grey cement realisations are estimated to have increased to Rs 3,523 a tonne in the September quarter, compared to Rs 2,940 a tonne in the same period a year ago.