In 10 years, A will be twice as old as B was 10 year ago. If A is now 9 years older than B, the present age of B is ?

Arithmetic Aptitude

1)	In 10 years, A will be twice as old as B was 10 year ago. If A is now 9 years older than B, the present age of B is ?

A) 19 years
B) 29 years
C) 39 years
D) 49 years

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