Chief Economic Advisor V Anantha Nageswaran on Thursday said India can achieve a 30 trillion dollar economy by the centenary year of its Independence, provided the country masters the challenge of technological prowess and frontier research. "To hit the USD 30 trillion mark by 2047, the country would require about 12 per cent growth (year-on-year) in dollar terms," Nageswaran said. He noted that the current GDP stands at approximately USD 3.91 trillion and is expected to reach USD 7.8 trillion within the next six years.