Present ages of X and Y are in the ratio 5:6 respectively. Seven years hence this ratio will become 6:7 respectively. What is X's present age in years?  Choose the correct option.
A) 40  B) 35  C) 28  D) 49  E) 70
Let the present ages of X and Y be 5x and 6x years respectively.   Then, (5x + 7)/(6x + 7) = 6/7   7(5x + 7) = 6(6x + 7) =&gt; x = 7   X's present age = 5x = 35 years.   ANSWER 35
<result>B</result>
Present ages of X and Y are in the ratio 5:6 respectively. Seven years hence this ratio will become 6:7 respectively. What is X's present age in years?