The present ages of three persons in proportions 4 : 7 : 9. Eight years ago, the sum of their ages was 56. Find their present ages (in years).  Choose the correct choice from the following options:  A) 8, 20, 28  B) 16, 28, 36  C) 20, 35, 45  D) 20, 35, 48  E) None of these
Let the present ages are 4x, 7x, 9x.   =&gt; (4x-8) + (7x-8) + (9x-8) = 56   =&gt; 20x = 80   =&gt; x = 4   So their present ages are: 16,28,36   ANSWER:16, 28, 36
<result>B</result>
The present ages of three persons in proportions 4 : 7 : 9. Eight years ago, the sum of their ages was 56. Find their present ages (in years).