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 most appropriate option
A) 8, 20, 28	B) 16 years, 28 years, 36 years	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 years, 28 years, 36 years
<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).