A motorboat takes
3
hours to travel
108km
going upstream. The return trip takes
2
hours going downstream. What is the rate of the boat in still water and what is the rate of the current?
A motorboat takes 3 hours to travel 144 mi going upstream. The return trip takes 2 hours going downstream. What is the rate of the boat in still water and what is the rate of the current? ---------------- 144/3 = 48 mph upstream
144/2 = 72 mph downstream The boat's speed is the average = 60 mph The current is the difference = 72-60 = 12 mph
