A man can row upstream at 30 kmph and downstream at 60 kmph, and then find the speed of the man in still water?  Answers:	A) 27	B) 29	C) 30	D) 20	E) 45
US = 30   DS = 60   M = (30 + 60)/2= 
<gadget id="calculator">(30 + 60)/2</gadget>
<output>45</output>
45   Answer:45
<result>E</result>
A man can row upstream at 30 kmph and downstream at 60 kmph, and then find the speed of the man in still water?