In 20 years, A will be twice as old as B was 20 years ago. If A is now 10 years older than B, the present age of B is?  Choose the correct option:
A) 35yrs B) 40yrs C) 50yrs D) 60yrs E) 70yrs
Let B's present age = x years   Then A's present age = x+10 years   x+10+20 = 2(x-20)   x + 30 = 2x - 40   x = 70years   Answer is 70yrs
<result>E</result>
In 20 years, A will be twice as old as B was 20 years ago. If A is now 10 years older than B, the present age of B is?