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    Question

    A man invested certain sum at 9% p.a. simple interest

    for his son who was 18 years old. If the amount received by the son when he was 28 years old is Rs. 10400, then find the sum invested by the man.
    A Rs. 5500 Correct Answer Incorrect Answer
    B Rs. 5600 Correct Answer Incorrect Answer
    C Rs. 5000 Correct Answer Incorrect Answer
    D Rs. 5800 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the sum invested by the man be Rs. x Time for which the sum is invested = 28 – 18 = 10 years According to the question, {(x × 9 × 10)/100} + x = 10400 Or, 2.08x = 10400 Or, x = 5000 Therefore, the sum invested by the man = Rs. 5000

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