A man can row upstream at 10kmph and downstream at 14kmph. Find man's rate in still water ?  Choose the correct answer: A) 5km/hr B) 15km/hr C) 10km/hr D) 12km/hr E) 7.5km/hr
Rate in still water = 1/2 (10+14) = 12km/hr   Answer is 12km/hr
<result>D</result>
A man can row upstream at 10kmph and downstream at 14kmph. Find man's rate in still water ?