A man can row upstream at 15kmph and downstream at 17kmph. Find man's rate in still water ? Options:
A) 5km/hr
B) 15km/hr
C) 10km/hr
D) 20km/hr
E) 16km/hr
Rate in still water = 1/2 (15+17) = 16km/hr   Answer is 16km/hr
<result>E</result>
A man can row upstream at 15kmph and downstream at 17kmph. Find man's rate in still water ?