The task is to generate the correct answer for a given math problem.
--------
Question: 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 ?

Answer: 5


Question: Problem: find compound interest on $ 10000 at 15 % per annum for 2 years 4 months , compounded annually .

Answer: 3886.25


Question: Problem: george went to a fruit market with certain amount of money . with this money he can buy either 40 oranges or 40 mangoes . he retains 10 % of the money for taxi fare and buys 20 mangoes . how many oranges can he buy ?

Answer:
25