Question
A certain sum of money becomes 2500 in 6 years and Rs.
3240 in 10 years at any certain rate of simple interest. Find the principal amount.Solution
Simple interest for 4 years = 3240 – 2500 = Rs. 740 Simple interest for 1 year = 740/4 = Rs. 185 Simple interest for 6 years = 185 × 6 = Rs. 1110 So, required principal amount = 2500 – 1110 = Rs. 1390
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