Question
The average age of a man and his son is 30 years. The ratio of their ages four years ago was 10:3 respectively. What is the difference between the present ages of the man and his son?
Answer: Option A
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Four years ago,
Father's age = 10x years
Son's age = 3x years
10x + 3x + 8 = 60
=> 13x = 60 - 8 = 52
=>x = 4
Required difference = 7x = 7 * 4 = 28 years
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