Task: Question Answering
Input (English): Problem: a bullet train covers a distance in 50 min, if it runs at a speed of 48 kmph on an average. the speed at which the bullet train must run to reduce the time of journey to 40 min will be.
Options: a. 80 kmph, b. 40 kmph, c. 60 kmph, d. 90 kmph, e. 30 kmph
Output (English): c