Question
A man deposited Rs. 12000 at 10% compound interest,
compounded annually while Rs. 10500 at 13% simple interest per annum. What will be the difference between the compound interest and the simple interest earned by him after 3 years?Solution
Compound interest earned by the man in 3 years = 12000 Ć {(1 + 10/100)3Ā ā 1)} = 12000 Ć 0.331 = Rs. 3972 Simple interest earned by the man in 3 years = 10500 Ć 0.13 Ć 3 = Rs. 4095 Required difference = 4095 ā 3972 = Rs. 123
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