The sum of the ages of a man and his son is 45 years. five years ago,the product of their ages in (years was) 124. find their present ages...
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Let father's present age be x years.
Son's present age =45−x
Therefore,
⇒(x−5)(40−x)=124
⇒40x−x^2−200+5x=124
⇒x^2−45x+324=0
⇒(x−9)(x−36)=0
⇒x=9,36
Clearly x cannot be 9
Therefore,
Father's present age = x=36 years
Son's present age = 45−36=9 years
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