Question

    A certain sum of money becomes 4000 in 6 years and Rs.

    5400 in 10 years at any certain rate of simple interest. Find the principal amount.
    A Rs. 1900 Correct Answer Incorrect Answer
    B Rs. 1800 Correct Answer Incorrect Answer
    C Rs. 1950 Correct Answer Incorrect Answer
    D Rs. 1980 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Simple interest for 4 years = 5400 – 4000 = Rs. 1400 Simple interest for 1 year = 1400/4 = Rs. 350 Simple interest for 6 years = 350 × 6 = Rs. 2100 So, required principal amount = 4000 – 2100 = Rs. 1900

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