In 10 years, A will be twice as old5as B was 10 years ago. If A is now 9 years older than B, the present age of B is Select:
A) 35
B) 37
C) 39
D) 41
E) 44
Explanation:   Let B's age = x years.   Then, As age = (x+ 9) years.   (x+9+10)=2(x—10)   hence x=39.   Present age of B = 39 years   Option 39
<result>C</result>
In 10 years, A will be twice as old5as B was 10 years ago. If A is now 9 years older than B, the present age of B is