The sum of the present ages of a father and his son is 60 years. five years ago, father's age was four times the age of the son. so now the son's age will be:

The sum of the present ages of a father and his son is 60 years. fi

1.	The sum of the present ages of a father and his son is 60 years. five years ago, father's age was four times the age of the son. so now the son's age will be:
A.	5
B.	10
C.	15
D.	20
Answer» D. 20