The simple interest on a sum of money at 10% per annum for 2 years is Rs. 8,100. Compounded annually, what would be the compound interest (in Rs.) on the same sum for the same period at the same rate of interest?

The simple interest on a sum of money at 10% per annum for 2 years is

1.	The simple interest on a sum of money at 10% per annum for 2 years is Rs. 8,100. Compounded annually, what would be the compound interest (in Rs.) on the same sum for the same period at the same rate of interest?
A.	8,100
B.	8,505
C.	8,715
D.	9,000
Answer» C. 8,715