# A man is four times as old as his son. In five years he will be only three times as old as his son. What is the man's present age?

##### 1 Answer

May 1, 2018

Man's present age : **40 years old.**

#### Explanation:

Let man's age =

Let son's age =

Since a man is 4 times as old as his son, therefore

In 5 years, he will only be 3 times as old as his son, therefore

Apply substitution method :

∴