Question
A man invested certain sum at 10% p.a. simple interest
for his son who was 17 years old. If the amount received by the son when he was 30 years old is Rs. 13200, then find the sum invested by the man.Solution
Let the sum invested by the man be Rs. x Time for which the sum is invested = 30 – 17 = 13 years According to the question, {(x × 10 × 13)/100} + x = 13200 Or, 2.2x = 13200 Or, x = 6000 Therefore, the sum invested by the man = Rs. 6000
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