A man can row upstream at 10kmph and downstream at 12kmph. Find man's rate in still water ?  Pick:	A) 11km/hr	B) 15km/hr	C) 10km/hr	D) 20km/hr	E) 7.5km/hr
Rate in still water = 1/2 (10+12) = 11km/hr   11km/hrnswer is 11km/hr
<result>A</result>
A man can row upstream at 10kmph and downstream at 12kmph. Find man's rate in still water ?