While India becoming the fifth largest economy in the world is an 'impressive achievement,' there is a need to grow fast to increase the per capita income of the country from the present levels, former Reserve Bank of India governor C Rangarajan said on Saturday. Rangarajan said post Covid-19 and the Russia-Ukraine war, there is a need to lay down a clear roadmap for India's future development and the first and foremost task is to raise the growth rate.