Let the age of Raju be x years.
Age of Rohan = (x+9) years.
Age of Raju 10 years ago = (x-10)years.
After 10 years,
Rohan's age = (x+19) years.
But according to Question,
Rohan's age = 2(x-10).
Age of Raju = 39 years.
Age of Rohan = 39+9 = 48 years. Ans.
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