Task: Question Answering
Input (English): Question: The two trains of lengths 400 m, 600 m respectively, running at same directions. The faster train can cross the slower train in 180 sec, the speed of the slower train is 48 km. then find the speed of the faster train?

 Option A: 60

 Option B: 68

 Option C: 67

 Option D: 69

 Option E: 70
Output (English): Option B