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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