A man whose speed is 4.5 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?	Choose the correct option:
A) 7 kmph
B) 4 kmph
C) 8 kmph
D) 3 kmph
E) 9 kmph
M = 45   S = 1.5   DS = 6   US = 3   AS = (2 * 6 * 3) /9= 
<gadget id="calculator">(2 * 6 * 3) /9</gadget>
<output>4</output>
4   Answer:4 kmph
<result>B</result>
A man whose speed is 4.5 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?