Bheja fry question

 I heard the question on web radio recently. 

It is a mathematical question. 

Question is 

When my father was 31 years old, I was 8 years old. 

Now he is twice old as me. 

How old am I ??

Answer - - - - -

Age of father  =  31

Age of son   =  8

Difference between their age  =  31  -   8   =   23

Let the age of father be x.

So, the age of son will be  ( x  -  23 ).

According to the question , now he is twice old as me, we get

x =  2 ( x  -  23 )

x = 2x - 46

x = 46. 

Hence, 

Age of father is 46 years 

Age of son is x - 23  = 46 - 23 = 23 years. 

Age of son is 23 years. .