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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

A. 39

B. 37

C. 41

D. 35

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Correct Answer :

A. 39


Let B's age = x years. Then, As age = (x+ 9) years. (x+9+10)=2(x10) hence x=39. Present age of B = 39 years

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