India has the potential to become a multi-trillion dollar economy with a per capita income of about $40,000 by 2050 if it manages to grow at seven per cent annually for the next 30-35 years, a top World Bank official has said.“If we can manage to grow at seven per cent for next 35 years, we will not only be the second largest economy in the world at that time but we will be prosperous and people will be rich enough,” World Bank Executive Director for Bangladesh, Bhutan, India and Sri lanka Subhash Chandra Garg said.