Task: Question Answering
Input (English): Problem: a man sitting in a train which is travelling at 50 kmph observes that a goods train, travelling in opposite direction, takes 9 seconds to pass him. if the goods train is 280 m long, find its speed ?
Options: a. 52 kmph., b. 62 kmph., c. 72 kmph., d. 80 kmph., e. none
Output (English): b