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 (in years)	Choose the correct choice from the following choices: A) 8, 20, 28 B) 16, 28, 36 C) 20, 35, 45 D) None of these E) Cannot be determined
Solution   Let their present ages be 4x,7x and 9x years respectively.   Then, (4x-8)+(7x-8)+(9x-8)	= 56   20x = 80   x= 4.   Their present ages are 16,28,36 years .   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 (in years)