Question
A sum of money grows to Rs. 3,640 in 6 years and Rs.
4,120 in 8 years under simple interest. What is the original principal amount?Solution
ATQ, Difference in interest over 2 years: 4,120 − 3,640 = 480 Annual interest: 480 / 2 = 240 Principal = 3,640 − (4 × 240) = 2,680
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