Question

A man is 3 times as old as his son. After 15 years, he will be only twice as old as his son. find their present ages.

Answer 1

Heya !!




Let the present age of son be X years.



Age of father = 3X.




After 15 years age of son = ( X + 15 ) years


After 15 years age of father = ( 3X + 15 ) years

According to the question,



3X + 15 = 2 ( X + 15)


3X + 15 = 2X + 30


3X - 2X = 30 - 15



X = 15 years



Present age of son = X = 15 years


And,


Present age of father = 3X = 3 × 15 = 45 years.

Answer 2

Hey friend! Here is your answer.

Let the son's present age be x.

Father's present age = 3x

After 15 years,

Son's age = x+15

Father's age = 3x + 15

According to the question,

3x+15=2(x+15)

3x+15=2x+30

3x-2x=30-15

x=15

Son's present age = 15 years

Father's present age = 3x

= 3×15

=45 years