Question
A sum becomes 9200 in 3 years and 10400 in 5 years at simple interest. Find the principal.
Solution
ATQ, Difference in amounts for 2 years = 10400 − 9200 = 1200 SI per year = 1200 ÷ 2 = 600 SI for 3 years = 600 × 3 = 1800 Principal = 9200 − 1800 = 7400
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