Task: Question Answering
Input (English): Question: A pipe can filled a tank in 40 minutes and another pipe can empty it in 1hour. If the tank is already half full and both the taps are opened together, then the tank is filled in how many minutes?

 Option A: 25min

 Option B: 20min

 Option C: 15min

 Option D: 10min

 Option E: 30min
Output (English): Option A