A sum of ₹25 amounts to ₹64 in 2 years at x% per annum compounded annually. If the ₹8000 is invested at (x - 5)% per annum for 3 years (the interest is compounded annually), then find the compound interest.
1
₹21791
2
₹29791
3
₹9000
4
More than one of the above
5
None of the above