16. Compute the compound interest

Find the compound interest at the rate of 13.8 \(\%\) per annum for 2 years on the principal, which in 7 years at the rate of 8.9 \(\%\) per annum gives 3452 as simple interest. (Use: ${\left(1.138\right)}^2$ \(\approx\) 1.295)

 

Answer:

 

The compound interest \(=\) \(₹\).

 

[Note: Submit the answer a whole whole number.]