Answer:
25 mph.
Step-by-step explanation:
Le tx mph be the speed of the boat in still water. Then the speed going downstream is x+5 mph and the speed going upstream is x-5 mph.
1. A boat goes 240 miles downstream and it took it
2. A boat goes 160 miles upstream and it took it
Then
Hope this helps! If you have any questions feel free to ask.
x = -10/3
x = -3 1/3