Respuesta :

Answer:

he's 11

Step-by-step explanation:why cause 55 - 11 = 44


letmeanswer

Age of jack is 11 years.

Option - a

SOLUTION:

Given that, Jack's father is 4 times as old as Jack.  

To find: youngest age that Jack could be.

The sum of their ages is no less than 55.  

Let the age of jack be n years, then his father’s age will be 4n years.

Now, we are given that, sum of ages [tex]=55 \rightarrow n+4 n=55 \rightarrow 5 n=55 \rightarrow n=11[/tex]

Important Statements and Equations for "Problems based on Ages":

  1. If the present age is y, then n times the present age [tex]= ny[/tex]
  2. If the present age is x, then age n years later/hence [tex]= x + n[/tex]
  3. If the present age is x, then age n years ago [tex]= x-n[/tex]
  4. The ages in a ratio a: b will be ax and bx
  5. If the current age is y, then 1/n of the age is [tex]\frac{y}{n}[/tex]

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