The task is to generate the correct answer for a given math problem.
--------
Question: Problem: if shares of two persons in profits are rs . 600 and rs . 1000 then ratio of their capitals is

Answer: 3 : 5


Question: Problem: a train passes a station platform in 36 sec and a man standing on the platform in 25 sec . if the speed of the train is 54 km / hr . what is the length of the platform ?

Answer: 165 


Question: Problem: it takes avery 3 hours to build a brick wall while tom can do it in 3 hours . if the two start working together and after an hour avery leaves , how much time will it take tom to complete the wall on his own ?

Answer:
60