The ratio between the present ages of A and B is 3.5:3 respectively. The ratio between A's age 4 years ago and B's age 4 years hence is 1:1. What is the ratio between A's age 4 years hence and B's age 4 years ago?
Pick: A) 14:4 B) 13:0 C) 15:11 D) 13:12 E) 13:17
Let the present ages of A and B be 3.5x and 3x years respectively.   Then, (3.5x - 4)/(3x + 4) = 1/1   0.5x = 8 =&gt; x = 16   Required ratio = (5x + 4):(3x - 4) = 60:44 = 15:11.Answer: 15:11
<result>C</result>
The ratio between the present ages of A and B is 3.5:3 respectively. The ratio between A's age 4 years ago and B's age 4 years hence is 1:1. What is the ratio between A's age 4 years hence and B's age 4 years ago?