The ratio between the present ages of A and B is 4.5:3 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? Select:
A) 3:4 B) 3:0 C) 3:1 D) 7:3 E) 3:7
Let the present ages of A and B be 4.5x and 3x years respectively.   Then, (4.5x - 4)/(3x + 4) = 1/1   1.5x = 8 =&gt; x = 5.33   Required ratio = (5x + 4):(3x - 4) = 28:12 = 7:3.Answer: 7:3
<result>D</result>
The ratio between the present ages of A and B is 4.5:3 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?