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    Question

    A man invested certain sum at 5% p.a. simple interest

    for his son who was 10 years old. If the amount received by the son when he was 30 years old is Rs. 4000, then find the sum invested by the man.
    A Rs. 2000 Correct Answer Incorrect Answer
    B Rs. 2700 Correct Answer Incorrect Answer
    C Rs. 2500 Correct Answer Incorrect Answer
    D Rs. 2800 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 = 30 – 10 = 20 years According to the question, {(x × 5 × 20)/100} + x = 4000 Or, 1.6x = 4000 Or, x = 2500 Therefore, the sum invested by the man = Rs. 2500

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