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) 25 ½ kmph	B) 28 ½ kmph	C) 42 ½ kmph	D) 20 ½ kmph	E) 22 ½ kmph
M = 100   S = x   DS = 10   US = 5   S = (10 - 5)/2   S= 2 2 ½ kmph   Answer: 22 ½ kmph
<result>E</result>
A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?