The sum of the ages of a father and his son Vijay is 45 years. Five years ago, the product of their ages was four times the fathers age at that time. The present age of father and son, respectively are

25 years,10 years

39 years, 6 years

36 years, 9 years

none of these

Let sons age be x years. Then fathers age = (45 - x)years. (x—5)(45—x—5) = 4(45- x - 5) hence (x—5) = 4 so x = 9 Their ages are 36 years and 9 years.

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