The task is to generate the correct answer for a given math problem.

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 ?
60

Problem: what is the probability of getting a queen or spade from a set of cards ?
4 / 13

Problem: gopi gives rs . 90 plus one turban as salary to his servant for one year . the servant leaves after 9 months and receives rs . 60 and the turban . find the price of the turban .
30