Question
A certain sum of money becomes 4000 in 6 years and Rs.
5400 in 10 years at any certain rate of simple interest. Find the principal amount.Solution
Simple interest for 4 years = 5400 ā 4000 = Rs. 1400 Simple interest for 1 year = 1400/4 = Rs. 350 Simple interest for 6 years = 350 Ć 6 = Rs. 2100 So, required principal amount = 4000 ā 2100 = Rs. 1900
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