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

[Q]: Problem: if 2 men or 3 women can reap a field in 10 days how long will 4 men and 5 women take to reap it ?
[A]: 11 / 30


[Q]: Problem: in a kilometer race , a beats b by 48 meters or 12 seconds . what time does a take to complete the race ?
[A]: 238 sec


[Q]: Problem: from mumbai railway station , two trains a and b start simultaneously from stations 400 miles apart , and travel the same route toward each other on adjacent parallel tracks . if train a and train b travel at a constant rate of 40 miles per hour and 40 miles per hour , respectively , how many miles will train a have traveled when the trains pass each other , to the nearest mile ?
[A]:
18