Task: Question Answering
Input (English): Problem: a woman complete a journey in 20 hours. she travels first half of the journey at the rate of 21 km / hr and second half at the rate of 24 km / hr. find the total journey in km.
Options: a. 334 km., b. 216 km., c. 314 km., d. 448 km., e. 544 km.
Output (English): d