Income tax on Ancestral property sold after 23 June 2024

In case of sell of the Ancestral property after 23 June 2024, What will be considered as cost price ?

If on date of sale I have only 1 residential house & after sale of the Ancestral property whether 2 flats can be purchased of Rs 3 Crores each [ Total purchase price Rs 6 Crore ] using section 54F (Since maximum exemption under this Section has been limited up to Rs. 10 crores from FY 2024-2025)