RRB NTPC CBT I 28 Dec 2020 Shift 2 Paper

The revenue earned by Company A in 2001 is Rs. 6,300 crore, that earned in 2010 is Rs. 8,100 crore and that earned in 2015 is Rs. 10,800 crore. What is the ratio of the increase in revenue between 2001 to 2010 and between 2010 to 2015?