In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is?
Answers:
A) 39yr  B) 42yr  C) 45yr  D) 32yr  E) 50yr
Let B's present age = x years   Then 39yr's present age = x+9 years   x+9+10 = 2(x-10)   x + 19 = 2x - 20   x = 39years   39yrnswer is 39yr
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In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is?