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    Question

    The difference between compound interest and simple

    interest at rate of 18% per annum for 2 years is Rs. 486. Find the simple interest obtained on same amount for a period of 2 years at rate of 10% per annum.
    A Rs. 2000 Correct Answer Incorrect Answer
    B Rs. 3000 Correct Answer Incorrect Answer
    C Rs. 2400 Correct Answer Incorrect Answer
    D Rs. 1500 Correct Answer Incorrect Answer
    E Rs. 1200 Correct Answer Incorrect Answer

    Solution

    Let, the amount be Rs. P. P[(1 + 18/100)2 тАУ 1] тАУ P ├Ч 18% ├Ч 2 = 486 P ├Ч 0.3924 тАУ P ├Ч 0.36 = 486 P ├Ч 0.0324 = 486 P = 486 ├╖ 0.0324 = Rs. 15000 Therefore, required interest = 15000 ├Ч 10% ├Ч 2 = Rs. 3000

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