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
A) 1
B) 7.5
C) 2.25
D) 1.5
E) 4
M = 3   S = x   DS = 3 + x   US = 3 - x   3 + x = (3 - x)2   3 + x = 3 -2x   3x = 3   x = 1   1NSWER:1
<result>A</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?