Question 751041
father is 61 yrs 
and son is 16 yrs 
as per conditions in how many years  father will be two times son age 
let x years after 
father =61+x
son = 16+x
61+x= 2(16+x)
61+x =32+ 2x
2x-x=61-32 =29
yrs

answer after 29 yrs father will be twice of son age