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    Question

    A certain sum of money becomes 2500 in 6 years and Rs.

    3240 in 10 years at any certain rate of simple interest. Find the principal amount.
    A Rs. 1390 Correct Answer Incorrect Answer
    B Rs. 1300 Correct Answer Incorrect Answer
    C Rs. 1290 Correct Answer Incorrect Answer
    D Rs. 1380 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Simple interest for 4 years = 3240 – 2500 = Rs. 740 Simple interest for 1 year = 740/4 = Rs. 185 Simple interest for 6 years = 185 × 6 = Rs. 1110 So, required principal amount = 2500 – 1110 = Rs. 1390

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