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    Question

    The simple interest earned on a principal of Rs. 6400 at

    an annual interest rate of (p + 4)% for 3 years is the same as the simple interest earned on a principal of Rs. 9600 at an annual interest rate of 5% for 4 years. Determine the value of 'p'.
    A 12 Correct Answer Incorrect Answer
    B 2 Correct Answer Incorrect Answer
    C 8 Correct Answer Incorrect Answer
    D 6 Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    ATQ, 6400 × (p + 4)% × 3 = 9600 × 5% × 4 64 × (p + 4) × 3 = 96 × 5 × 4 (p + 4) = 10 p = 10 – 4 p = 6 

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