A man can row downstream at 18 kmph and upstream at 12 kmph. Find the speed of the man in still water and the speed of stream respectively? Choose one.
A) 3
B) 5
C) 6
D) 4
E) 9
Let the speed of the man in still water and speed of stream be x kmph and y kmph respectively.   Given x + y = 18 --- (1)   and x - y = 12 --- (2)   From (1) &amp; (2) 2x = 30 =&gt; x = 15, y = 3. 3nswer: 3
<result>A</result>
A man can row downstream at 18 kmph and upstream at 12 kmph. Find the speed of the man in still water and the speed of stream respectively?