Respuesta :

Hello, Julio can be no younger then 11. Hoped I helped! 

Answer:

11 years

Step-by-step explanation:

Let the age of Julio is x.

Age of Julio's father = 4 x

According to the question, the sum of their ages is not less than 55.

x + 4x > 55

5 x > 55

x > 11

Thus, the youngest age of Julio is 11 years.