Task: Question Answering
Input (English): Question: The ratio between the speeds of two trains is 7: 8. If the second train runs 400 kms in 4 hours, then the speed of the first train is ?

 Option A: 83.5 km/hr

 Option B: 84.5 km/hr

 Option C: 86.5 km/hr

 Option D: 87.5 km/hr

 Option E: None of these
Output (English): Option D