A man whose speed is 6.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 2.5 kmph, find his average speed for the total journey ?
Pick one.
A) 1 kmph B) 5 kmph C) 5.5 kmph D) 4 kmph E) 7 kmph
Explanation:   Speed of Man = 6.5 kmph   Speed of stream = 2.5 kmph   Speed in DownStream = 9 kmph   Speed in UpStream = 4 kmph   Average Speed = (2 x 9 x 4)/13 = 5.5 kmph.   Answer: 5.5 kmph
<result>C</result>
A man whose speed is 6.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 2.5 kmph, find his average speed for the total journey ?