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.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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