



 
Hi Jenn, I can get you started. The important concept here is that rate = distance/time. In the units you are using the rate (speed) is then in miles per hour. Suppose that the speed of the boat in still water is s miles per hour and the speed of the river is r miles per hour. When the boat goes upstream it is going against the current so its speed is s  r miles per hour. Since the distance is 50 miles and going upstream took 3 hours you have
Find the analogous equation for the trip downstream and then solve the pair of equations for s and r. Penny  


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 