A man is 30 years older than his son. In two years, his age will be twice the age of his son. What is the present age of his son? Choose the correct choice from the following answers.
A) 23 years	B) 28 years	C) 21 years	D) 20 years	E) 19 years

Rationale: "let present age of the son = x years then , present age the man = ( x + 30 ) years given that , in 2 years , man ' s age will be twice the age of his son â ‡ ’ ( x + 30 ) + 2 = 2 ( x + 2 ) â ‡ ’ x = 28 answer : b"
Answer: B