Question 754565
let age of father is 5x yrs
and age of  john is x yrs

age of father when john born was 32 yrs 
present age of father when john age is x +32 yrs  with consideration of both conditions  we can say
5x=x+32
5x-x=32
4x=32
x=32/4
x=8yrs
john  present age is 8 yrs 
and father present age is  40 yrs
answer  father 40 yrs
        john age is 8yrs