Task: Question Answering
Input (English): Question: A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?

 Option A: 25 ½ kmph

 Option B: 28 ½ kmph

 Option C: 42 ½ kmph

 Option D: 20 ½ kmph

 Option E: 22 ½ kmph
Output (English): Option E