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    Question

    The sum of present ages of Rina and Tina is 72 years. After

    6 years, the ratio of their ages will be 5:7. Find the difference in their ages.
    A 10 yrs Correct Answer Incorrect Answer
    B 12 yrs Correct Answer Incorrect Answer
    C 14 yrs Correct Answer Incorrect Answer
    D 18 yrs Correct Answer Incorrect Answer

    Solution

    ATQ,

    6 years later, let the ages of Rina and Tina be '5y' years and '7y' years, respectively

    So, present ages of Rina and Tina are (5y - 6) years and (7y - 6) years, respectively

    We have, (5y - 6) + (7y - 6) = 72

    So, 12y = 72 + 12 = 84

    So, y = 84 ÷ 12 = 7

    So, difference between ages of Rina and Tina = 7y - 5y = 2y = 2 × 7 = 14 years

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