The sum of the ages of the son and father is 120 years. The father's age is 3 times than that of the son. What is the age of father?

The sum of the ages of the son and father is 120 years. The father's age is 3 times than that of the son. What is the age of father? Correct Answer 90

let, age of son is x years so the age of the father is 3x according to the question, x + 3x = 120 or, 4x = 120 ∴ x = 30 so, father's age is = 3*30 = 90 years
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