Question

The age of the father is twice the sum of the ages of his two children. After 20 years, his age will be equal to the sum of the ages of his children. Find the age of the father...

Answer 1

let the fathers age be x yrsthe sum of ages of 2 children be (a+b)yrsacc to 1st conditionx=2(a+b)=2a+2b.....(1)acc to 2nd conditionx+20=a+20+b+20x+20=a+b+40x=a+b+20.....(2)equating (1) & (2) a+b=20sub this in(1)x=40therefore the fathers age is 40 yrs.
 
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