A man can swim in still water at 3 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is?  Choose the correct choice from the following:
A) 1.7 B) 1.0 C) 1.2 D) 1.5 E) 1.16
M = 3   S = x   DS = 3 + x   US = 3 + x   3 + x = (3 - x)2   3 + x = 6 -2x   3x = 3   x = 1.0   Answer: 1.0
<result>B</result>
A man can swim in still water at 3 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is?