The task is to generate the correct answer for a given math problem.
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Question: Problem: a train passes a station platform in 30 sec and a man standing on the platform in 20 sec . if the speed of the train is 54 km / hr . what is the length of the platform ?

Answer: 60 


Question: Problem: a number x is 5 times another number y . the percentage that y is less than x is

Answer: 80 %


Question: Problem: a can do a piece of work in 16 days . when he had worked for 2 days b joins him . if the complete work was finished in 8 days . in how many days b alone can finish the work ?

Answer:
1