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    Question

    Rs. 3200 when invested at 7.5% p.a. for (x + 6) years

    gives a simple interest of Rs. 4800. Find the amount received when the same sum is invested at 6% p.a. simple interest for 2x years.
    A Rs.7900 Correct Answer Incorrect Answer
    B Rs.8576 Correct Answer Incorrect Answer
    C Rs.7520 Correct Answer Incorrect Answer
    D Rs.8320 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    According to the question,
    (3200 × 7.5 × (x + 6)) ÷ 100 = 4800
    Or, 240(x + 6) = 4800
    Or, x + 6 = 20
    Or, x = 14
    Therefore, 2x = 28 years
    Required amount received = {(3200 × 6 × 28) ÷ 100} + 3200  = (5376) + 3200 = Rs. 8576

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