Question

It takes a boat 3 hours to travel 45 miles downstream and 4 hours to travel 44 miles upstream.

What is the speed of the boat in still water?
The boat travels at...
miles per hour in still water.
What is the speed of the current of the river?
The speed of the current is...
miles per hour.

Answer 1

2 miles per hour

Explanation:

We use the distance formula. D = r * t

45/3 = 15 mph | Trip 1 |

44/4= 11mph | Trip 2 |

15-11 = 4 mph difference traveling upstream or downstream. Thus the speed of the current is 2 miles per hour.