Question

a father is three times as old as his son after 15 years he will be twice as old as his son what are their present ages

Answer 1

Let the present age of son be a

Present age of father = 3a

According to question,

3a + 15 = 2 ( a + 15)

=> 3a + 15 = 2a + 30

=> a = 15

Son's present age = 15 years

Father's present age = 45 years

Answer 2

let present age of son be c year's.
father age = 3c year's.


according to question


2 ( c + 15 ) = 3c + 15

2c + 30 = 3c + 15


c = 15 years.

present age of son = 15 years.

present age of Father = 45 years.