The age of a father 4 years ago was 8 times the age of his son. At present, the age of the father is 4 times the age of his son. Find the age of son .

9 years 7 years 14 years 18 years

7 years

Let the present age of son be x  Present age of father will be 4x  According to question,  \(\frac{x - 4}{4x-4}\) = \(\frac{1}{8}\) 8x - 32 = 4x - 4  4x = 28  x= 7 years  So, age of son is 7 years.