present ages of A and B are in the ratio of 7:5 respectively. 5 years hence, the ratio of their ages will become 15:12 respectively . what A's present age in years?	Choose the correct choice from the following:  A) 20  B) 7/3  C) 15/4  D) 21/5  E) 20/3
A and B be 7x years and 5x years respectively   (7x+5)/(5x+5)=15/12   4(7x+5)= 5(5x+5)   x = 3/5   therefore A's present age : 7x=21/5 years   correct answer(21/5)
<result>D</result>
present ages of A and B are in the ratio of 7:5 respectively. 5 years hence, the ratio of their ages will become 15:12 respectively . what A's present age in years?