TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a swimmer can swim in still water at 4 km / h . if the speed of the water current is 2 km / h , how many hours will the swimmer take to swim against the current for 5 km ?

SOLUTION: 2.5

PROBLEM: Problem: the average of 6 no . ' s is 3.95 . the average of 2 of them is 3.8 , while the average of theother 2 is 3.85 . what is the average of the remaining 2 no ' s ?

SOLUTION: 4.2

PROBLEM: Problem: a train running at the speed of 72 km / hr crosses a pole in 9 seconds . find the length of the train .

SOLUTION:
180 meter