TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: two trains , a and b , started simultaneously from opposite ends of a 125 - mile route and traveled toward each other on parallel tracks . train a , traveling at a constant rate , completed the 125 - mile trip in 12 hours ; train b , traveling at a constant rate , completed the 125 - mile trip in 8 hours . how many miles had train a traveled when it met train b ?

SOLUTION: 5

PROBLEM: Problem: if mn ≠ 0 and 25 percent of n equals 37 1 / 2 percent of m , what is the value of 12 n / m ?

SOLUTION: 18

PROBLEM: Problem: the area of a triangle is with base 12 m and height 5 m ?

SOLUTION:
30 m 2