Question

A man is $56$ years old and his son is $24$ years old. In how many years, the father will be twice as old as his son .

Answer 1

Let after $x$ years their ages are twice
$\therefore$ Age of father after $x$ years $=x+56$
and, Age of son after $x$ years $=x+24$
$(x+56)=2(x+24)$
So, $x=8$