Hyderabad: TRS working president and former minister KT Rama Rao today appreciated Singareni Collieries for its stupendous performance and earning more revenue during five years. \r\nKTR gave a pat to Singareni CMD Sridhar for improving revenue and performance. While the revenue was Rs 11,929 cr five years ago, it rose by 117 per cent to Rs 25,828 cr KTR noted. Similarly, the Singareni Collieries earned more benefits by increasing 288 per cent from Rs 419 cr to Rs 1600 cr. On this achievement, the former minister appreciated the CMD Sridhar and staff for coordinated efforts.