Task: Question Answering
Input (English): Question: The speed of a boat in upstream is 40 kmph and the speed of the boat downstream is 70 kmph. Find the speed of the boat in still water and the speed of the stream?

 Option A: 70,10 kmph

 Option B: 55,15 kmph

 Option C: 70,70 kmph

 Option D: 78,10 kmph

 Option E: 70,12 kmph
Output (English): Option B