If the simple interest on a sum of money for 4 years at 8% per annum is Rs. 560, what is the compound interest on the same sum at the rate and for the same time? Pick one: A) Rs. 640.86 B) Rs. 430.86 C) Rs. 330.86 D) Rs. 630.86 E) Rs. 130.86
Sum = (50 * 100) / (2 * 5) = Rs. 1,750.00   C.I. on Rs. 1,750.00 for 4 years at 8% = Rs. 2,380.86.   = Rs. 2,380.86 - 1,750.00 = Rs. 630.86   ANSWER:Rs. 630.86
<result>D</result>
If the simple interest on a sum of money for 4 years at 8% per annum is Rs. 560, what is the compound interest on the same sum at the rate and for the same time?