A man can row upstream at 20 kmph and downstream at 60 kmph, and then find the speed of the man in still water?	Choose the correct choice from the following choices
A) 32 kmph
B) 34 kmph
C) 30 kmph
D) 45 kmph
E) 40 kmph

Rationale: "us = 20 ds = 60 m = ( 20 + 60 ) / 2 = 40 answer : e"
Answer: E