Question 880679
RT=D rate time distance.


r = boat speed without a current
c = speed of current


__________________speed______________time_________distance
DOWN______________r+c________________11___________198
UP________________r-c________________33___________198


Travel uniform rates law allows the system:
{{{highlight_green((r+c)*11=198)}}} and {{{highlight_green((r-c)*33=198)}}}.
Simple linear system in variables r and c.
Solve for r and c.