SOLUTION: a boat takes 2/3 as much time to travel downstream from c to d,as to return.if the rate of the rivers current is 8kph,what is the speed of the boat in still water?

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Question 621969: a boat takes 2/3 as much time to travel downstream from c to d,as to return.if the rate of the rivers current is 8kph,what is the speed of the boat in still water?

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

a boat takes 2/3 as much timehighlight%28t%29to travel downstream from c to d,as to return.

if the rate of the rivers current is 8kph,what is the speed of the boat in still water?

 D = rt  and distance the same for both trips

 +%28r-8%29t+=+%28r%2B8%29%282%2F3%29t

     +%28r-8%29+=+%28r%2B8%29%282%2F3%29

        %28r%2F3%29+=+16%2F3+%2B+24%2F3+

              r = 40 kph