Dear Student ,

First , you try to solve the question on your own , and then look into this solution :

Let us assume, present age of son is x ,

so present age of father will be 2x. ( as per the ques.)

20 years ago.

Age of son: (x-20)

Age of Father: (2x-20)

Now according to the question :

2x-20= 12(x-20)

x= 22

present age of father = 22*2= 44 years .

Hope this helps !