A man can row downstream at 18 kmph and upstream at 6 kmph. Find the speed of the man in still water and the speed of stream respectively? Choices
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 = 6 --- (2)   From (1) &amp; (2) 2x = 24 =&gt; x = 12, y = 6. Answer: 6
<result>C</result>
A man can row downstream at 18 kmph and upstream at 6 kmph. Find the speed of the man in still water and the speed of stream respectively?