Question 621969
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
a boat takes 2/3 as much time{{{highlight(t)}}}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?
 D = rt  and distance the same for both trips
 {{{ (r-8)t = (r+8)(2/3)t}}}
     {{{ (r-8) = (r+8)(2/3)}}}
        {{{(r/3) = 16/3 + 24/3 }}}
              r = 40 kph