A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?
Pick one:
A) 22 1/9
B) 22 1/7
C) 22 1/1
D) 22 1/2
E) 32 1/2
100 --- 10 22 1/2S = 10   ? ---- 1   75 ---- 15 US = 5   ? ----- 1 S = (10 - 5)/2   = 22 1/2 kmph.Answer:22 1/2
<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?