A boat goes 100 km downstream in 10 hours, and 200 Km upstream in 25 hours. The speed of the stream is?  Choose the correct choice from the following answers:
A) 1
B) 22 1/7
C) 2
D) 22 1/2
E) 3
100 --- 10 DS = 10   ? ---- 1   200 ---- 30 US = 8   ? ----- 1 S = (10 - 8)/2= 
<gadget id="calculator">(10 - 8)/2</gadget>
<output>1</output>
1 kmph.   1nswer:1
<result>A</result>
A boat goes 100 km downstream in 10 hours, and 200 Km upstream in 25 hours. The speed of the stream is?