The sume of the present ages of a father and his son is 60 years.Six years ago ,father’s ago was five times the age of the son.After 6 years,son’s age will be : Options.
A) 12 years
B) 14 years
C) 18 years
D) 20 years
E) None of these
Solution   Let the present ages of son and father be x and (60 - x)years recepectively.   Then,(60 -x)-6 =5(x-6) ⇔ 54 -x = 5x - 30 ⇔ 6x = 84 ⇔ x =14.   ∴ son's age after 6 years = (x + 6) = 20 years. Answer 20 years
<result>D</result>
The sume of the present ages of a father and his son is 60 years.Six years ago ,father’s ago was five times the age of the son.After 6 years,son’s age will be :