TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a is twice as good a workman as b and they took 6 days together to do the work b alone can do it in .

SOLUTION: 18 days

PROBLEM: Problem: a train traveling at 72 kmph crosses a platform in 33 seconds and a man standing on the platform in 18 seconds . what is the length of the platform in meters ?

SOLUTION: 300 meters

PROBLEM: Problem: a man can row upstream at 25 kmph and downstream at 31 kmph , and then find the speed of the man in still water ?

SOLUTION:
28