Today, the father's age is twice the age of his son. Twenty years later, the father's age will be three times that of his son today. How old is the son today?

Today, the father's age is twice the age of his son. Twenty years late

1.	Today, the father's age is twice the age of his son. Twenty years later, the father's age will be three times that of his son today. How old is the son today?
A.	10 years
B.	20 years
C.	30 years
D.	40 years
Answer» C. 30 years