Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs. 4000 for 2 years at 10% per annum. The sum placed on simple interest is: Options: A) Rs. 1550 B) Rs. 1650 C) Rs. 1750 D) Rs. 2000 E) Rs. 2500
Explanation:   C.I.   = Rs.[4000x(1+10/100)2-4000]   =Rs.(4000x11/10x11/10-4000)   =Rs.840.   Sum = Rs.(420 x 100/ 3x8)=Rs. 1750.   ANSWER IS Rs. 1750
<result>C</result>
Simple interest on a certain sum of money for 3 years at 8% per annum is half the compound interest on Rs. 4000 for 2 years at 10% per annum. The sum placed on simple interest is: