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Question
In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, then the present age of B is
19 years
29 years
39 years
49 years
ANSWER : 3
Descrption
<p>Let, B's present age is x year & 10 years ago he was (x-10) </p><p>After 10 years, A= 2((x-10), B= (x+10)</p><p>Now, 2(x+10)-(x+10)=9</p><p>Or, x=39 years.</p>
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