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    Question

    A man invested certain sum at 7.5% p.a. simple interest

    for his son who was 11 years old. If the amount received by the son when he was 22 years old is Rs. 6840, then find the sum invested by the man.
    A Rs. 3000 Correct Answer Incorrect Answer
    B Rs. 3700 Correct Answer Incorrect Answer
    C Rs. 3600 Correct Answer Incorrect Answer
    D Rs. 3200 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 = 22 – 11 = 11 years According to the question, {(x × 7.5 × 11)/100} + x = 6840 Or, 1.9x = 6840 Or, x = 3600 Therefore, the sum invested by the man = Rs. 3600

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