A man can row 4.5 km/hr in still water and he finds that it takes him twice as long to row up as to row down the river. Find the rate of the stream. Select the correct option.
A) 2	B) 2.5	C) 1.5	D) 1	E) 3
Speed - x   upward speed (4.5-x)   downward = 4.5+x   distance =&gt; y   time rowing upwards = 2 * time rowing upwards   y/4.5-x = 2*y/4.5+x   x =1.5 km/hr   ANSWER 1.5
<result>C</result>
A man can row 4.5 km/hr in still water and he finds that it takes him twice as long to row up as to row down the river. Find the rate of the stream.