The ratio between the present ages of A and B is 4:3 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 the correct option
A) 3:4  B) 3:0  C) 3:1  D) 3:2  E) 9:5
Let the present ages of A and B be 4x and 3x years respectively.   Then, (4x - 4)/(3x + 4) = 1/1   1x = 8 =&gt; x = 8   Required ratio = (4x + 4):(3x - 4) = 36:20 = 9:5.Answer: 9:5
<result>E</result>
The ratio between the present ages of A and B is 4:3 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?