Answers

2015-07-27T09:49:16+05:30
Answer:
       Let Present age of father be x years.
  and present age of Son be y years.

Five years Ago ,
   Father's age = x-5
  Son's age = y - 5
  According to Question ,
   x - 5 = 7 (y -5 )
  or x -5 = 7y - 35
or x =7y - 35 + 5
or x =7y - 30 --------------------------------------(ist)

Five Years Hence ,
Father's age = x+5
Son's age = y+5
According to question ,
   x+5 = 3(y+5)
x+5 = 3y + 15
or x = 3y +15 - 5
or x=3y +10 ....................................(2nd)
From ist and 2nd we get
  7y - 30 =3y + 10
or 7y - 3y = 10 +30
or 4y = 40
or y = 10
hence Present age of Son = 10 years
Substitute y= 10 in equation ist , we get
 x = 7*10 - 30
or x= 70 - 30
or x= 40
Therefore Present age of Father = 40 years

Hope this helps you!!

Thank You!!

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