Question
The value of an investment at simple interest grows to Rs.
11,200 in 2 years and Rs. 15,200 in 6 years. What was the principal amount?Solution
ATQ,
Interest earned in 4 years = 15,200 - 11,200 = Rs. 4,000
Interest earned in 2 years = (4,000 / 4) × 2 = Rs. 2,000
So, amount invested = 11,200 - 2,000 = Rs. 9,200
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