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    Question

    Suresh deposited Rs. тАШQтАЩ in a bank offering compound

    interest of 7% p.a. compounded annually. After 5 years, he invested the amount received from the bank in scheme тАШKтАЩ and тАШLтАЩ in the ratio of 10:7 respectively. Scheme тАШLтАЩ offers compound interest of 21% p.a. compounded annually while scheme тАШKтАЩ offers simple interest of 11% p.a. If total interest received by him from schemes K and L together at the end of 2 years is Rs. 4026.4, then find the value of тАШQтАЩ.
    A Rs.7000 Correct Answer Incorrect Answer
    B Rs.4500 Correct Answer Incorrect Answer
    C Rs.6000 Correct Answer Incorrect Answer
    D Rs.5000 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ Let amount invested in scheme тАШKтАЩ and scheme тАШLтАЩ be Rs. тАШ10uтАЩ and Rs. тАШ7uтАЩ, respectively. So, 0.11 ├Ч 2 ├Ч 10u + 0.42 ├Ч 7u = 4026.4 Or, 2.2u + 2.94u = 4026.4 Or, 5.14u = 4026.4 Or, u = 783.23 So, Q = (10 ├Ч 783.23 + 7 ├Ч 783.23)/(1.07 ├Ч 1.07 ├Ч 1.07 ├Ч 1.07 ├Ч 1.07) = Rs. 7000

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