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The sum of the ages of the father and son is 80 years. If ten years ago the age of father was three times that of his son, find the present age of the son.

The sum of the ages of the father and son is 80 years. If ten years ago the age of father was three times that of his son, find the present age of the son. Correct Answer 25

Let,Son = x yearsThen, Father = (80-x) years10 years ago,Son was = (x-10) yearsFather was = (80-x-10) = (70-x) yearsATQ, 70-x = 3(x-10)=> 70-x = 3x-30=> 4x = 100=> x = 100÷4 = 25 yearsSo, Son is 25 years old. Ans. 25 

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