Task: Question Answering
Input (English): Problem: two goods trains each 820 m long are running in opposite directions on parallel tracks. their speeds are 45 km / hr and 30 km / hr respectively. find the time taken by the slower train to pass the driver of the faster one ?
Options: a. 228, b. 27.32, c. 76.6, d. 78.72, e. 21
Output (English): d