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
Answer: Option C
C.I. = Rs. 4000 x 1 + 10 2 - 4000 100 = Rs. 4000 x 11 x 11 - 4000 10 10 = Rs. 840.
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