Task: Question Answering
Input (English): Question: Tom and John traveled in the same direction along the equal route at their constant speed rates of 15 km per hour and 10 km per hour, respectively. After 15 minutes Tom passed John, Tom reaches a certain Gas station, how many R minutes it takes John to reach the station?

 Option A: 5 min

 Option B: 6 min

 Option C: 7 and 1/2 min

 Option D: 8 min

 Option E: 10 min
Output (English): Option C