The present ages of three persons are in proportions 4:7:9. Eight years ago, the sum of their ages was 56. Find their present ages?  Choose the correct choice from the following options:
A) 16, 26, 36  B) 16, 28, 36  C) 16, 28, 38  D) 16, 28, 32  E) 16, 28, 30
Let their present ages be 4x, 7x and 9x years respectively.   Then, (4x - 8) + (7x - 8) + (9x - 8) = 56   20x = 80 =&gt; x = 4   Their present ages are 16, 28 and 36 years respectively.   Answer: 16, 28, 36
<result>B</result>
The present ages of three persons are in proportions 4:7:9. Eight years ago, the sum of their ages was 56. Find their present ages?