Solution: Let the fiscal revenue in the nth year be, and the annual repayment constitutes a series.

Due to (ten thousand yuan), ∴ (ten thousand yuan),

Then 1 year, you can repay the loan of tens of thousands of yuan and still owe the loan (ten thousand yuan).

In the second year, you can repay tens of thousands, and you still owe loans (ten thousand yuan).

Number of loans to be repaid in the third year (ten thousand yuan),

That is, the loan can be repaid in the third year.

The loan can be paid off within three years.