TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: arjun started a business with rs . 20,000 and is joined afterwards by anoop with rs . 80 , 000 . after how many months did anoop join if the profits at the end of the year are divided equally ?

SOLUTION: 9

PROBLEM: Problem: find the cost of fencing around a circular field of diameter 16 m at the rate of rs . 3 a meter ?

SOLUTION: 150.84

PROBLEM: Problem: some persons can do a piece of work in 16 days . two times the number of these people will do half of that work in ?

SOLUTION:
4