A man whose speed is 5.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph, find his average speed for the total journey?  Pick one
A) 7 B) 5.1 C) 6 D) 9 E) 3
M = 5.5   S = 1.5   DS = 7   US = 4   AS = (2 * 7 * 4) /11 = 5.1   Answer:5.1
<result>B</result>
A man whose speed is 5.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph, find his average speed for the total journey?