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    Question

    Arjun made two investments: the first was Rs. 1,600 at

    an annual simple interest rate of R% for a period of 2 years, and the second was Rs. 2,000 at an annual simple interest rate of (R + 5)% for 3 years. The total interest he earned from both investments combined was Rs. 1,772. Calculate the value of R.
    A 12 Correct Answer Incorrect Answer
    B 15 Correct Answer Incorrect Answer
    C 16 Correct Answer Incorrect Answer
    D 10 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    According to question; 1600 ├Ч R/100 ├Ч 2 + 2000 ├Ч (R + 5)/100 ├Ч 3 = 1772 32R + 60R + 300 = 1772 92R = 1472 R = 16

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