The Tax payable is to be computed by using the indexation factor.
If the value of house construction is Rs. 100000 in 2004 (Index - 113 ) it will be Rs. 240707 in 2017-18.(Index - 272). We need to arrive at the cost of construction/acquisition as per indexation, then if any improvements during these much years need to be calculated. I give you simple calculation. (Ex - Cost of Construction 10 Lakh & Cost of Improvement - 1 lakh in 2010 (index for [deleted]))
Sale consideration - Rs. 35.50
Less : Cost of Construction Rs. 24.07
Less : Cost of Improvement Rs. 1.62
Capital Gain Rs. 9.81
This 9.81 is taxable @ 20%. We can claim exemptions u/s 54 and so on. Also if the valuation comes to 47.16 and we need to consider sec 50C where income tax department can invoke Market rate for sale consideration.