The task is to generate the correct answer for a given math problem.

[Q]: Problem: a man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph , find his average speed for the total journey ?
[A]: 4


[Q]: Problem: how many liters of a 40 % iodine solution need to be mixed with 35 liters of a 20 % iodine solution to create a 32 % iodine solution ?
[A]: 102


[Q]: Problem: if 2 a = 3 b and ab ≠ 0 , what is the ratio of a / 3 to b / 2 ?
[A]:
1