Present ages of X and Y are in the ratio 5:6 respectively. Ten years hence this ratio will become 6:7 respectively. What is X's present age in years?
Choose the correct choice from the following.
A) 35 B) 36 C) 50 D) 39 E) 40
Let the present ages of X and Y be 5x and 6x years respectively.   Then, (5x + 10)/(6x + 10) = 6/7   7(5x +10) = 6(6x +10) =&gt; 35x+70= 36x+60 =&gt; x=10   X's present age = 5x = 5*10= 
<gadget id="calculator">5*10</gadget>
<output>50</output>
50   ANSWER:50
<result>C</result>
Present ages of X and Y are in the ratio 5:6 respectively. Ten years hence this ratio will become 6:7 respectively. What is X's present age in years?