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    Question

    Five years from now, K and M together will be 80 years

    old. If their present ages are in the ratio 4:3, find the difference in their ages.
    A 10 yrs Correct Answer Incorrect Answer
    B 12 yrs Correct Answer Incorrect Answer
    C 16 yrs Correct Answer Incorrect Answer
    D 18 yrs Correct Answer Incorrect Answer

    Solution

    Let the present ages of K and M be 4x and 3x years.
    Sum of the present ages = 80 − 10 = 70 years
    ATQ,
    (4x + 3x) = 70
    7x = 70
    So, x = 10
    So, difference between their present ages = (4x − 3x) = x = 10 years

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