A man whose speed is 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? Select:
A) 7  B) 4  C) 6  D) 9  E) 4.55
M = 5.0   S = 1.5   DS = 6.5   US = 3.5   AS = (2 * 6 * 3) /10 = 4.55   Answer:4.55
<result>E</result>
A man whose speed is 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?