Capital gain on sale of land

92 cents land purchased on Aug-1998 for Rs. 22,30,000 /- 29.19 cents sold on Mar-2011 for Rs. 42,26,500/- My Questions are: 1)Can the purchase value to be considered as Rs.7,07,540 (22.30 Lakh /92 cent)*29.19 cents 2)Can we calculate the capital gains under two method i.e. with indexing and without indexing 3)What will be the Capital gain tax amount