The age of the two friends were in the ration of 6:5. If the sum of their ages is 55. Then after how many years their ratio will become 8:7?
Choose the correct choice from the following answers:	A) 11	B) 7	C) 10	D) 12	E) 13
since given ratio is 6:5 of their ages.   6x+5x=55(given)   11x=55   x=5. so present ages are:  6*5= 
<gadget id="calculator"> 6*5</gadget>
<output>30</output>
30 and   5*5= 
<gadget id="calculator">  5*5</gadget>
<output>25</output>
25   after few yrs ratio becomes 8:5.   so,their ages will become 8x and 7x respectively, ie. 40 and 35 respectively.   nw difference of their current ages and further ages is clear from above... ie. 10 yrs.   ANSWER:10
<result>C</result>
The age of the two friends were in the ration of 6:5. If the sum of their ages is 55. Then after how many years their ratio will become 8:7?