if in one hour, a canoe rows at 16 km/hr downstream and 9 km/hr upstream, Calculate the speed of a boat in still water (in km/hr).  Choose the correct answer:
A) 18 kmph  B) 15.5 kmph  C) 12.5 kmph  D) 13.5 kmph  E) 22.5 kmph
Speed in still water = (16 + 9)1/2 kmph = 12.5 kmph.   answer :12.5 kmph
<result>C</result>
if in one hour, a canoe rows at 16 km/hr downstream and 9 km/hr upstream, Calculate the speed of a boat in still water (in km/hr).