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    Question

    Ratio of present age of a teacher to that of his

    student is 5:1. After 6 years the ratio will become 3:1. What is the difference (in years) in their present ages?
    A 16 Correct Answer Incorrect Answer
    B 24 Correct Answer Incorrect Answer
    C 20 Correct Answer Incorrect Answer
    D 18 Correct Answer Incorrect Answer

    Solution

    Let present age of teacher and his student be β€˜5x’ years and β€˜x’ years, respectively. ATQ; (5x + 6)/(x + 6) = 3/1 Or, 5x + 6 = 3x + 18 Or, 2x = 12 Or, x = 6 Desired difference = 5x – x = 4x = 4 Γ— 6 = 24 years

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