Question
Out of a total sum of ₹5,000, Danish invested one part
at 12% simple interest per annum and the remaining part at 10% simple interest per annum. If the total interest that accrued to Danish in two years equals ₹, 1072, what was the sum Danish invested at 12% simple interest per annum?Solution
Let Rs. P be invested at 12% simple interest. Hence, (5000 - P) is invested at 10% simple interest. According to the question, (P × 12 × 2)/100 + ((5000 - P) × 10 × 2)/100 = 1072 24P - 20P + 100000 = 107200 4P =7200 P=1800.
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