TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: two trains of equal length , running with the speeds of 60 and 90 kmph , take 50 seconds to cross each other while they are running in the same direction . what time will they take to cross each other if they are running in opposite directions ?

SOLUTION: 6.6

PROBLEM: Problem: the smallest value of n , for which n + 2 is not a prime number , is

SOLUTION: 2,4

PROBLEM: Problem: the price of 10 chairs is equal to that of 4 tables . the price of 15 chairs and 2 tables together is rs . 4000 . the total price of 12 chairs and 3 tables is ?

SOLUTION:
rs . 3900