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 answer:
A) 20, 35, 45
B) 16, 28, 36
C) 8, 20, 28
D) None of these
E) 30,25,12
Answer: Option B   :   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.
<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.