A man whose speed is 3 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?	Choices:
A) 7  B) 4  C) 3  D) 9  E) 3.6
M = 3   S = 1.5   DS = 4.5   US = 3   AS = (2 * 4.5 * 3) /7.5= 
<gadget id="calculator">(2 * 4.5 * 3) /7.5</gadget>
<output>3.6</output>
3.6   Answer:3.6
<result>E</result>
A man whose speed is 3 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?