Task: Question Answering
Input (English): Problem: two bike riders ride in opposite directions around a circular track, starting at the same time from the same point. biker a rides at a speed of 16 kmph and biker b rides at a speed of 14 kmph. if the track has a diameter of 40 km, after how much time ( in hours ) will the two bikers meet ?
Options: a. 8.18 hrs., b. 6.18 hrs., c. 4.18 hrs., d. 1.18 hrs., e. 7.18 hrs.
Output (English): c