A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?	Choices
A) 22 1/2 kmph
B) 2 2 1/8 kmph
C) 2 2 1/0 kmph
D) 2 2 1/2 kmph
E) 2 2 2/2 kmph
100 --- 10 2 2 1/2 kmphS = 10   ? ---- 1   75 ---- 15 US = 5   ? ----- 1 S = (10 - 5)/2   = 2 2 1/2 kmph   Answer: 2 2 1/2 kmph
<result>D</result>
A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?