A man can row upstream at 30 kmph and downstream at 60 kmph, and then find the speed of the man in still water?	Select the correct option
A) 27
B) 29
C) 30
D) 20
E) 45

Rationale: "us = 30 ds = 60 m = ( 30 + 60 ) / 2 = 45 answer : e"
Answer: E