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    Question

    A certain sum of money becomes 3000 in 6 years and Rs.

    4000 in 10 years at any certain rate of simple interest. Find the principal amount.
    A Rs. 1000 Correct Answer Incorrect Answer
    B Rs. 1200 Correct Answer Incorrect Answer
    C Rs. 1500 Correct Answer Incorrect Answer
    D Rs. 1400 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Simple interest for 4 years = 4000 – 3000 = Rs.1000 Simple interest for 1 year = 1000/4 = Rs. 250 Simple interest for 6 years = 250 × 6 = Rs. 1500 So, required principal amount = 3000 – 1500 = Rs. 1500

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